97481557 has 4 divisors (see below), whose sum is σ = 100843020. Its totient is φ = 94120096.

The previous prime is 97481537. The next prime is 97481617. The reversal of 97481557 is 75518479.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75518479 = 173 ⋅436523.

It can be written as a sum of positive squares in 2 ways, for example, as 26770276 + 70711281 = 5174^2 + 8409^2 .

It is a cyclic number.

It is not a de Polignac number, because 97481557 - 2¹⁵ = 97448789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97481507) 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, 1680688 + ... + 1680745.

It is an arithmetic number, because the mean of its divisors is an integer number (25210755).

Almost surely, 2^97481557 is an apocalyptic number.

It is an amenable number.

97481557 is a deficient number, since it is larger than the sum of its proper divisors (3361463).

97481557 is a wasteful number, since it uses less digits than its factorization.

97481557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361462.

The product of its digits is 352800, while the sum is 46.

The square root of 97481557 is about 9873.2748872904. The cubic root of 97481557 is about 460.2291816392.

The spelling of 97481557 in words is "ninety-seven million, four hundred eighty-one thousand, five hundred fifty-seven".