77701691 has 2 divisors, whose sum is σ = 77701692. Its totient is φ = 77701690.

The previous prime is 77701667. The next prime is 77701721. The reversal of 77701691 is 19610777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77701691 - 2¹⁸ = 77439547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77701651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38850845 + 38850846.

It is an arithmetic number, because the mean of its divisors is an integer number (38850846).

Almost surely, 2^77701691 is an apocalyptic number.

77701691 is a deficient number, since it is larger than the sum of its proper divisors (1).

77701691 is an equidigital number, since it uses as much as digits as its factorization.

77701691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18522, while the sum is 38.

The square root of 77701691 is about 8814.8562665536. The cubic root of 77701691 is about 426.7204831884.

The spelling of 77701691 in words is "seventy-seven million, seven hundred one thousand, six hundred ninety-one".