77630522 has 4 divisors (see below), whose sum is σ = 116445786. Its totient is φ = 38815260.

The previous prime is 77630521. The next prime is 77630549. The reversal of 77630522 is 22503677.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22503677 = 7 ⋅3214811.

It can be written as a sum of positive squares in only one way, i.e., 77598481 + 32041 = 8809^2 + 179^2 .

It is not an unprimeable number, because it can be changed into a prime (77630521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19407629 + ... + 19407632.

Almost surely, 2^77630522 is an apocalyptic number.

77630522 is a deficient number, since it is larger than the sum of its proper divisors (38815264).

77630522 is a wasteful number, since it uses less digits than its factorization.

77630522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38815263.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 77630522 is about 8810.8184636843. The cubic root of 77630522 is about 426.5901619285.

The spelling of 77630522 in words is "seventy-seven million, six hundred thirty thousand, five hundred twenty-two".