86277979 has 2 divisors, whose sum is σ = 86277980. Its totient is φ = 86277978.

The previous prime is 86277887. The next prime is 86278007. The reversal of 86277979 is 97977268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86277979 - 2¹³ = 86269787 is a prime.

It is not a weakly prime, because it can be changed into another prime (86277179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43138989 + 43138990.

It is an arithmetic number, because the mean of its divisors is an integer number (43138990).

Almost surely, 2^86277979 is an apocalyptic number.

86277979 is a deficient number, since it is larger than the sum of its proper divisors (1).

86277979 is an equidigital number, since it uses as much as digits as its factorization.

86277979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 55.

The square root of 86277979 is about 9288.5940270850. The cubic root of 86277979 is about 441.8755664137.

The spelling of 86277979 in words is "eighty-six million, two hundred seventy-seven thousand, nine hundred seventy-nine".