78846131 has 16 divisors (see below), whose sum is σ = 97944000. Its totient is φ = 61803648.

The previous prime is 78846121. The next prime is 78846151. The reversal of 78846131 is 13164887.

It is a cyclic number.

It is not a de Polignac number, because 78846131 - 2¹⁸ = 78583987 is a prime.

It is a super-2 number, since 2×78846131² = 12433424747338322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78846101) 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, 5945 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (6121500).

Almost surely, 2^78846131 is an apocalyptic number.

78846131 is a deficient number, since it is larger than the sum of its proper divisors (19097869).

78846131 is a wasteful number, since it uses less digits than its factorization.

78846131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8078.

The product of its digits is 32256, while the sum is 38.

The square root of 78846131 is about 8879.5343909464. The cubic root of 78846131 is about 428.8052847137.

The spelling of 78846131 in words is "seventy-eight million, eight hundred forty-six thousand, one hundred thirty-one".