77439051 has 8 divisors (see below), whose sum is σ = 114724560. Its totient is φ = 51626016.

The previous prime is 77439049. The next prime is 77439067. The reversal of 77439051 is 15093477.

It is a happy number.

It is not a de Polignac number, because 77439051 - 2¹ = 77439049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77438997 and 77439015.

It is not an unprimeable number, because it can be changed into a prime (77439751) 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, 1434030 + ... + 1434083.

It is an arithmetic number, because the mean of its divisors is an integer number (14340570).

Almost surely, 2^77439051 is an apocalyptic number.

77439051 is a deficient number, since it is larger than the sum of its proper divisors (37285509).

77439051 is a wasteful number, since it uses less digits than its factorization.

77439051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868122 (or 2868116 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 77439051 is about 8799.9460793803. The cubic root of 77439051 is about 426.2391535554.

The spelling of 77439051 in words is "seventy-seven million, four hundred thirty-nine thousand, fifty-one".