78693153 has 64 divisors (see below), whose sum is σ = 143493120. Its totient is φ = 37094400.

The previous prime is 78693149. The next prime is 78693169. The reversal of 78693153 is 35139687.

It is not a de Polignac number, because 78693153 - 2² = 78693149 is a prime.

It is a super-2 number, since 2×78693153² = 12385224658162818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78693113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 113538 + ... + 114228.

It is an arithmetic number, because the mean of its divisors is an integer number (2242080).

Almost surely, 2^78693153 is an apocalyptic number.

It is an amenable number.

78693153 is a deficient number, since it is larger than the sum of its proper divisors (64799967).

78693153 is a wasteful number, since it uses less digits than its factorization.

78693153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758.

The product of its digits is 136080, while the sum is 42.

The square root of 78693153 is about 8870.9161308176. The cubic root of 78693153 is about 428.5277811581.

It can be divided in two parts, 786 and 93153, that added together give a palindrome (93939).

The spelling of 78693153 in words is "seventy-eight million, six hundred ninety-three thousand, one hundred fifty-three".