77140631 has 2 divisors, whose sum is σ = 77140632. Its totient is φ = 77140630.

The previous prime is 77140621. The next prime is 77140699. The reversal of 77140631 is 13604177.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77140631 - 2¹⁰ = 77139607 is a prime.

It is a super-2 number, since 2×77140631² = 11901353902156322, 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 = 77140594 and 77140603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77140621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38570315 + 38570316.

It is an arithmetic number, because the mean of its divisors is an integer number (38570316).

Almost surely, 2^77140631 is an apocalyptic number.

77140631 is a deficient number, since it is larger than the sum of its proper divisors (1).

77140631 is an equidigital number, since it uses as much as digits as its factorization.

77140631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 77140631 is about 8782.9739268655. The cubic root of 77140631 is about 425.6909287335.

The spelling of 77140631 in words is "seventy-seven million, one hundred forty thousand, six hundred thirty-one".