97217842 has 4 divisors (see below), whose sum is σ = 145826766. Its totient is φ = 48608920.

The previous prime is 97217837. The next prime is 97217843. The reversal of 97217842 is 24871279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24871279 = 1987 ⋅12517.

It can be written as a sum of positive squares in only one way, i.e., 82464561 + 14753281 = 9081^2 + 3841^2 .

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 junction number, because it is equal to n+sod(n) for n = 97217795 and 97217804.

It is not an unprimeable number, because it can be changed into a prime (97217843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24304459 + ... + 24304462.

Almost surely, 2^97217842 is an apocalyptic number.

97217842 is a deficient number, since it is larger than the sum of its proper divisors (48608924).

97217842 is a wasteful number, since it uses less digits than its factorization.

97217842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48608923.

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

The square root of 97217842 is about 9859.9108515240. The cubic root of 97217842 is about 459.8137904164.

The spelling of 97217842 in words is "ninety-seven million, two hundred seventeen thousand, eight hundred forty-two".