97816319 has 4 divisors (see below), whose sum is σ = 98766096. Its totient is φ = 96866544.

The previous prime is 97816267. The next prime is 97816321. The reversal of 97816319 is 91361879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91361879 = 7 ⋅13051697.

It is a cyclic number.

It is not a de Polignac number, because 97816319 - 2⁸ = 97816063 is a prime.

It is a super-2 number, since 2×97816319² = 19136064525419522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97816319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97816339) 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, 474734 + ... + 474939.

It is an arithmetic number, because the mean of its divisors is an integer number (24691524).

Almost surely, 2^97816319 is an apocalyptic number.

97816319 is a deficient number, since it is larger than the sum of its proper divisors (949777).

97816319 is a wasteful number, since it uses less digits than its factorization.

97816319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949776.

The product of its digits is 81648, while the sum is 44.

The square root of 97816319 is about 9890.2132939588. The cubic root of 97816319 is about 460.7554049941.

The spelling of 97816319 in words is "ninety-seven million, eight hundred sixteen thousand, three hundred nineteen".