78541831 has 12 divisors (see below), whose sum is σ = 82731064. Its totient is φ = 74541600.

The previous prime is 78541829. The next prime is 78541843. The reversal of 78541831 is 13814587.

It is not a de Polignac number, because 78541831 - 2¹ = 78541829 is a prime.

It is a super-2 number, since 2×78541831² = 12337638433665122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78541871) 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 11 ways as a sum of consecutive naturals, for example, 50536 + ... + 52066.

Almost surely, 2^78541831 is an apocalyptic number.

78541831 is a deficient number, since it is larger than the sum of its proper divisors (4189233).

78541831 is a wasteful number, since it uses less digits than its factorization.

78541831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1621 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 78541831 is about 8862.3829188317. The cubic root of 78541831 is about 428.2529275543.

The spelling of 78541831 in words is "seventy-eight million, five hundred forty-one thousand, eight hundred thirty-one".