77139043 has 18 divisors (see below), whose sum is σ = 83333796. Its totient is φ = 71384544.

The previous prime is 77138983. The next prime is 77139061. The reversal of 77139043 is 34093177.

It is not a de Polignac number, because 77139043 - 2¹⁷ = 77007971 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77130043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1151296 + ... + 1151362.

Almost surely, 2^77139043 is an apocalyptic number.

77139043 is a deficient number, since it is larger than the sum of its proper divisors (6194753).

77139043 is an equidigital number, since it uses as much as digits as its factorization.

77139043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 77139043 is about 8782.8835242191. The cubic root of 77139043 is about 425.6880076536.

The spelling of 77139043 in words is "seventy-seven million, one hundred thirty-nine thousand, forty-three".