79977487 has 2 divisors, whose sum is σ = 79977488. Its totient is φ = 79977486.

The previous prime is 79977473. The next prime is 79977529. The reversal of 79977487 is 78477997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79977487 - 2²³ = 71588879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79977407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39988743 + 39988744.

It is an arithmetic number, because the mean of its divisors is an integer number (39988744).

Almost surely, 2^79977487 is an apocalyptic number.

79977487 is a deficient number, since it is larger than the sum of its proper divisors (1).

79977487 is an equidigital number, since it uses as much as digits as its factorization.

79977487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6223392, while the sum is 58.

The square root of 79977487 is about 8943.0133064868. The cubic root of 79977487 is about 430.8465152242.

The spelling of 79977487 in words is "seventy-nine million, nine hundred seventy-seven thousand, four hundred eighty-seven".