97646021 has 4 divisors (see below), whose sum is σ = 106522944. Its totient is φ = 88769100.

The previous prime is 97645963. The next prime is 97646023. The reversal of 97646021 is 12064679.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97646021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97646023) 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, 4438445 + ... + 4438466.

It is an arithmetic number, because the mean of its divisors is an integer number (26630736).

Almost surely, 2^97646021 is an apocalyptic number.

It is an amenable number.

97646021 is a deficient number, since it is larger than the sum of its proper divisors (8876923).

97646021 is a wasteful number, since it uses less digits than its factorization.

97646021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8876922.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 97646021 is about 9881.6001234618. The cubic root of 97646021 is about 460.4878582798.

The spelling of 97646021 in words is "ninety-seven million, six hundred forty-six thousand, twenty-one".