77277131 has 2 divisors, whose sum is σ = 77277132. Its totient is φ = 77277130.

The previous prime is 77277107. The next prime is 77277157. The reversal of 77277131 is 13177277.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77277131 - 2¹⁰ = 77276107 is a prime.

It is a super-2 number, since 2×77277131² = 11943509951182322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77277091 and 77277100.

It is not a weakly prime, because it can be changed into another prime (77277191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38638565 + 38638566.

It is an arithmetic number, because the mean of its divisors is an integer number (38638566).

Almost surely, 2^77277131 is an apocalyptic number.

77277131 is a deficient number, since it is larger than the sum of its proper divisors (1).

77277131 is an equidigital number, since it uses as much as digits as its factorization.

77277131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14406, while the sum is 35.

The square root of 77277131 is about 8790.7412087946. The cubic root of 77277131 is about 425.9418668423.

The spelling of 77277131 in words is "seventy-seven million, two hundred seventy-seven thousand, one hundred thirty-one".