97219917 has 6 divisors (see below), whose sum is σ = 140428782. Its totient is φ = 64813272.

The previous prime is 97219907. The next prime is 97219931. The reversal of 97219917 is 71991279.

It can be written as a sum of positive squares in only one way, i.e., 80622441 + 16597476 = 8979^2 + 4074^2 .

It is not a de Polignac number, because 97219917 - 2⁴ = 97219901 is a prime.

It is a super-2 number, since 2×97219917² = 18903424522973778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97219907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5401098 + ... + 5401115.

It is an arithmetic number, because the mean of its divisors is an integer number (23404797).

Almost surely, 2^97219917 is an apocalyptic number.

It is an amenable number.

97219917 is a deficient number, since it is larger than the sum of its proper divisors (43208865).

97219917 is a wasteful number, since it uses less digits than its factorization.

97219917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10802219 (or 10802216 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 97219917 is about 9860.0160750376. The cubic root of 97219917 is about 459.8170617872.

The spelling of 97219917 in words is "ninety-seven million, two hundred nineteen thousand, nine hundred seventeen".