79820087 has 2 divisors, whose sum is σ = 79820088. Its totient is φ = 79820086.

The previous prime is 79820047. The next prime is 79820113. The reversal of 79820087 is 78002897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79820087 - 2⁶ = 79820023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79820047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39910043 + 39910044.

It is an arithmetic number, because the mean of its divisors is an integer number (39910044).

Almost surely, 2^79820087 is an apocalyptic number.

79820087 is a deficient number, since it is larger than the sum of its proper divisors (1).

79820087 is an equidigital number, since it uses as much as digits as its factorization.

79820087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 79820087 is about 8934.2088066040. The cubic root of 79820087 is about 430.5636865567.

The spelling of 79820087 in words is "seventy-nine million, eight hundred twenty thousand, eighty-seven".