77139634 has 16 divisors (see below), whose sum is σ = 135938880. Its totient is φ = 32366160.

The previous prime is 77139607. The next prime is 77139641. The reversal of 77139634 is 43693177.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134574 + ... + 135145.

It is an arithmetic number, because the mean of its divisors is an integer number (8496180).

Almost surely, 2^77139634 is an apocalyptic number.

77139634 is a deficient number, since it is larger than the sum of its proper divisors (58799246).

77139634 is a wasteful number, since it uses less digits than its factorization.

77139634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269745.

The product of its digits is 95256, while the sum is 40.

The square root of 77139634 is about 8782.9171691415. The cubic root of 77139634 is about 425.6890947856.

The spelling of 77139634 in words is "seventy-seven million, one hundred thirty-nine thousand, six hundred thirty-four".