77790634 has 4 divisors (see below), whose sum is σ = 116685954. Its totient is φ = 38895316.

The previous prime is 77790631. The next prime is 77790641. The reversal of 77790634 is 43609777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 76475025 + 1315609 = 8745^2 + 1147^2 .

It is not an unprimeable number, because it can be changed into a prime (77790631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19447657 + ... + 19447660.

Almost surely, 2^77790634 is an apocalyptic number.

77790634 is a deficient number, since it is larger than the sum of its proper divisors (38895320).

77790634 is a wasteful number, since it uses less digits than its factorization.

77790634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38895319.

The product of its (nonzero) digits is 222264, while the sum is 43.

The square root of 77790634 is about 8819.8998860531. The cubic root of 77790634 is about 426.8832395244.

The spelling of 77790634 in words is "seventy-seven million, seven hundred ninety thousand, six hundred thirty-four".