97422781 has 4 divisors (see below), whose sum is σ = 97483932. Its totient is φ = 97361632.

The previous prime is 97422763. The next prime is 97422791. The reversal of 97422781 is 18722479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18722479 = 3319 ⋅5641.

It can be written as a sum of positive squares in 2 ways, for example, as 793881 + 96628900 = 891^2 + 9830^2 .

It is a cyclic number.

It is not a de Polignac number, because 97422781 - 2⁵ = 97422749 is a prime.

It is a super-2 number, since 2×97422781² = 18982396515547922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97422791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28120 + ... + 31393.

It is an arithmetic number, because the mean of its divisors is an integer number (24370983).

Almost surely, 2^97422781 is an apocalyptic number.

It is an amenable number.

97422781 is a deficient number, since it is larger than the sum of its proper divisors (61151).

97422781 is a wasteful number, since it uses less digits than its factorization.

97422781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61150.

The product of its digits is 56448, while the sum is 40.

The square root of 97422781 is about 9870.2979185028. The cubic root of 97422781 is about 460.1366654420.

The spelling of 97422781 in words is "ninety-seven million, four hundred twenty-two thousand, seven hundred eighty-one".