77245713 has 6 divisors (see below), whose sum is σ = 111577154. Its totient is φ = 51497136.

The previous prime is 77245687. The next prime is 77245717. The reversal of 77245713 is 31754277.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 13373649 = 7992^2 + 3657^2 .

It is not a de Polignac number, because 77245713 - 2⁸ = 77245457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77245717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4291420 + ... + 4291437.

Almost surely, 2^77245713 is an apocalyptic number.

It is an amenable number.

77245713 is a deficient number, since it is larger than the sum of its proper divisors (34331441).

77245713 is a wasteful number, since it uses less digits than its factorization.

77245713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582863 (or 8582860 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 77245713 is about 8788.9540333307. The cubic root of 77245713 is about 425.8841349908.

The spelling of 77245713 in words is "seventy-seven million, two hundred forty-five thousand, seven hundred thirteen".