97974637 has 4 divisors (see below), whose sum is σ = 97995420. Its totient is φ = 97953856.

The previous prime is 97974619. The next prime is 97974647. The reversal of 97974637 is 73647979.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91183401 + 6791236 = 9549^2 + 2606^2 .

It is a cyclic number.

It is not a de Polignac number, because 97974637 - 2⁷ = 97974509 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 (97974647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453 + ... + 14005.

It is an arithmetic number, because the mean of its divisors is an integer number (24498855).

Almost surely, 2^97974637 is an apocalyptic number.

It is an amenable number.

97974637 is a deficient number, since it is larger than the sum of its proper divisors (20783).

97974637 is a wasteful number, since it uses less digits than its factorization.

97974637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20782.

The product of its digits is 2000376, while the sum is 52.

The square root of 97974637 is about 9898.2138287673. The cubic root of 97974637 is about 461.0038521361.

The spelling of 97974637 in words is "ninety-seven million, nine hundred seventy-four thousand, six hundred thirty-seven".