97213921 has 8 divisors (see below), whose sum is σ = 111950784. Its totient is φ = 82689360.

The previous prime is 97213901. The next prime is 97213943. The reversal of 97213921 is 12931279.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97213921 - 2⁷ = 97213793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97213901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52090 + ... + 53923.

It is an arithmetic number, because the mean of its divisors is an integer number (13993848).

Almost surely, 2^97213921 is an apocalyptic number.

It is an amenable number.

97213921 is a deficient number, since it is larger than the sum of its proper divisors (14736863).

97213921 is a wasteful number, since it uses less digits than its factorization.

97213921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106151.

The product of its digits is 6804, while the sum is 34.

The square root of 97213921 is about 9859.7120140499. The cubic root of 97213921 is about 459.8076085809.

The spelling of 97213921 in words is "ninety-seven million, two hundred thirteen thousand, nine hundred twenty-one".