77952487 has 2 divisors, whose sum is σ = 77952488. Its totient is φ = 77952486.

The previous prime is 77952437. The next prime is 77952499. The reversal of 77952487 is 78425977.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77952487 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77952487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77952437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38976243 + 38976244.

It is an arithmetic number, because the mean of its divisors is an integer number (38976244).

Almost surely, 2^77952487 is an apocalyptic number.

77952487 is a deficient number, since it is larger than the sum of its proper divisors (1).

77952487 is an equidigital number, since it uses as much as digits as its factorization.

77952487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 49.

The square root of 77952487 is about 8829.0705626357. The cubic root of 77952487 is about 427.1790954921.

The spelling of 77952487 in words is "seventy-seven million, nine hundred fifty-two thousand, four hundred eighty-seven".