97788615 has 16 divisors (see below), whose sum is σ = 156670848. Its totient is φ = 52084256.

The previous prime is 97788599. The next prime is 97788619. The reversal of 97788615 is 51688779.

It is a cyclic number.

It is not a de Polignac number, because 97788615 - 2⁴ = 97788599 is a prime.

It is a super-2 number, since 2×97788615² = 19125226447236450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97788619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8464 + ... + 16346.

It is an arithmetic number, because the mean of its divisors is an integer number (9791928).

Almost surely, 2^97788615 is an apocalyptic number.

97788615 is a deficient number, since it is larger than the sum of its proper divisors (58882233).

97788615 is a wasteful number, since it uses less digits than its factorization.

97788615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718.

The product of its digits is 846720, while the sum is 51.

The square root of 97788615 is about 9888.8126183076. The cubic root of 97788615 is about 460.7119017793.

It can be divided in two parts, 977886 and 15, that added together give a triangular number (977901 = T₁₃₉₈).

The spelling of 97788615 in words is "ninety-seven million, seven hundred eighty-eight thousand, six hundred fifteen".