77097730 has 16 divisors (see below), whose sum is σ = 139113144. Its totient is φ = 30764160.

The previous prime is 77097707. The next prime is 77097733. The reversal of 77097730 is 3779077.

It can be written as a sum of positive squares in 4 ways, for example, as 25674489 + 51423241 = 5067^2 + 7171^2 .

It is not an unprimeable number, because it can be changed into a prime (77097733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4947 + ... + 13366.

Almost surely, 2^77097730 is an apocalyptic number.

77097730 is a deficient number, since it is larger than the sum of its proper divisors (62015414).

77097730 is a wasteful number, since it uses less digits than its factorization.

77097730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18741.

The product of its (nonzero) digits is 64827, while the sum is 40.

The square root of 77097730 is about 8780.5313051090. The cubic root of 77097730 is about 425.6119994980.

The spelling of 77097730 in words is "seventy-seven million, ninety-seven thousand, seven hundred thirty".