77713031 has 8 divisors (see below), whose sum is σ = 84875904. Its totient is φ = 70566520.

The previous prime is 77713019. The next prime is 77713033. The reversal of 77713031 is 13031777.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77713031 - 2¹⁰ = 77712007 is a prime.

It is a super-2 number, since 2×77713031² = 12078630374413922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77712985 and 77713003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77713033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7220 + ... + 14406.

It is an arithmetic number, because the mean of its divisors is an integer number (10609488).

Almost surely, 2^77713031 is an apocalyptic number.

77713031 is a deficient number, since it is larger than the sum of its proper divisors (7162873).

77713031 is a wasteful number, since it uses less digits than its factorization.

77713031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8181.

The product of its (nonzero) digits is 3087, while the sum is 29.

The square root of 77713031 is about 8815.4994753559. The cubic root of 77713031 is about 426.7412411017.

The spelling of 77713031 in words is "seventy-seven million, seven hundred thirteen thousand, thirty-one".