77867941 has 2 divisors, whose sum is σ = 77867942. Its totient is φ = 77867940.

The previous prime is 77867927. The next prime is 77867957. The reversal of 77867941 is 14976877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 2090916 = 8705^2 + 1446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77867941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77867641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38933970 + 38933971.

It is an arithmetic number, because the mean of its divisors is an integer number (38933971).

Almost surely, 2^77867941 is an apocalyptic number.

It is an amenable number.

77867941 is a deficient number, since it is larger than the sum of its proper divisors (1).

77867941 is an equidigital number, since it uses as much as digits as its factorization.

77867941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 49.

The square root of 77867941 is about 8824.2813305107. The cubic root of 77867941 is about 427.0246024579.

The spelling of 77867941 in words is "seventy-seven million, eight hundred sixty-seven thousand, nine hundred forty-one".