80959987 has 2 divisors, whose sum is σ = 80959988. Its totient is φ = 80959986.

The previous prime is 80959979. The next prime is 80959997. The reversal of 80959987 is 78995908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80959987 - 2³ = 80959979 is a prime.

It is not a weakly prime, because it can be changed into another prime (80959937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40479993 + 40479994.

It is an arithmetic number, because the mean of its divisors is an integer number (40479994).

Almost surely, 2^80959987 is an apocalyptic number.

80959987 is a deficient number, since it is larger than the sum of its proper divisors (1).

80959987 is an equidigital number, since it uses as much as digits as its factorization.

80959987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 55.

The square root of 80959987 is about 8997.7767809610. The cubic root of 80959987 is about 432.6036140093.

The spelling of 80959987 in words is "eighty million, nine hundred fifty-nine thousand, nine hundred eighty-seven".