77147908 has 6 divisors (see below), whose sum is σ = 135008846. Its totient is φ = 38573952.

The previous prime is 77147899. The next prime is 77147909. The reversal of 77147908 is 80974177.

It can be written as a sum of positive squares in only one way, i.e., 71774784 + 5373124 = 8472^2 + 2318^2 .

It is not an unprimeable number, because it can be changed into a prime (77147909) 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 as a sum of consecutive naturals, namely, 9643485 + ... + 9643492.

Almost surely, 2^77147908 is an apocalyptic number.

It is an amenable number.

77147908 is a deficient number, since it is larger than the sum of its proper divisors (57860938).

77147908 is a wasteful number, since it uses less digits than its factorization.

77147908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19286981 (or 19286979 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 77147908 is about 8783.3881845220. The cubic root of 77147908 is about 425.7043140509.

The spelling of 77147908 in words is "seventy-seven million, one hundred forty-seven thousand, nine hundred eight".