77261713 has 4 divisors (see below), whose sum is σ = 79925940. Its totient is φ = 74597488.

The previous prime is 77261693. The next prime is 77261729. The reversal of 77261713 is 31716277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31716277 = 827 ⋅38351.

It can be written as a sum of positive squares in 2 ways, for example, as 27531009 + 49730704 = 5247^2 + 7052^2 .

It is a cyclic number.

It is not a de Polignac number, because 77261713 - 2²¹ = 75164561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77261213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332070 + ... + 1332127.

It is an arithmetic number, because the mean of its divisors is an integer number (19981485).

Almost surely, 2^77261713 is an apocalyptic number.

It is an amenable number.

77261713 is a deficient number, since it is larger than the sum of its proper divisors (2664227).

77261713 is a wasteful number, since it uses less digits than its factorization.

77261713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664226.

The product of its digits is 12348, while the sum is 34.

The square root of 77261713 is about 8789.8642196566. The cubic root of 77261713 is about 425.9135375966.

The spelling of 77261713 in words is "seventy-seven million, two hundred sixty-one thousand, seven hundred thirteen".