78700131 has 6 divisors (see below), whose sum is σ = 113677980. Its totient is φ = 52466748.

The previous prime is 78700129. The next prime is 78700133. The reversal of 78700131 is 13100787.

It is an interprime number because it is at equal distance from previous prime (78700129) and next prime (78700133).

It is not a de Polignac number, because 78700131 - 2¹ = 78700129 is a prime.

It is a super-2 number, since 2×78700131² = 12387421238834322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78700095 and 78700104.

It is not an unprimeable number, because it can be changed into a prime (78700133) 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, 4372221 + ... + 4372238.

It is an arithmetic number, because the mean of its divisors is an integer number (18946330).

Almost surely, 2^78700131 is an apocalyptic number.

78700131 is a deficient number, since it is larger than the sum of its proper divisors (34977849).

78700131 is a wasteful number, since it uses less digits than its factorization.

78700131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744465 (or 8744462 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 78700131 is about 8871.3094298418. The cubic root of 78700131 is about 428.5404471414.

The spelling of 78700131 in words is "seventy-eight million, seven hundred thousand, one hundred thirty-one".