77138835 has 16 divisors (see below), whose sum is σ = 126433440. Its totient is φ = 40136960.

The previous prime is 77138833. The next prime is 77138837. The reversal of 77138835 is 53883177.

It is an interprime number because it is at equal distance from previous prime (77138833) and next prime (77138837).

It is not a de Polignac number, because 77138835 - 2¹ = 77138833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77138833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62100 + ... + 63329.

It is an arithmetic number, because the mean of its divisors is an integer number (7902090).

Almost surely, 2^77138835 is an apocalyptic number.

77138835 is a deficient number, since it is larger than the sum of its proper divisors (49294605).

77138835 is a wasteful number, since it uses less digits than its factorization.

77138835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125478.

The product of its digits is 141120, while the sum is 42.

The square root of 77138835 is about 8782.8716829975. The cubic root of 77138835 is about 425.6876250407.

The spelling of 77138835 in words is "seventy-seven million, one hundred thirty-eight thousand, eight hundred thirty-five".