77031242 has 4 divisors (see below), whose sum is σ = 115546866. Its totient is φ = 38515620.

The previous prime is 77031223. The next prime is 77031257. The reversal of 77031242 is 24213077.

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., 53304601 + 23726641 = 7301^2 + 4871^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19257809 + ... + 19257812.

Almost surely, 2^77031242 is an apocalyptic number.

77031242 is a deficient number, since it is larger than the sum of its proper divisors (38515624).

77031242 is a wasteful number, since it uses less digits than its factorization.

77031242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38515623.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77031242 is about 8776.7443850211. The cubic root of 77031242 is about 425.4896170398.

The spelling of 77031242 in words is "seventy-seven million, thirty-one thousand, two hundred forty-two".