80645959 has 2 divisors, whose sum is σ = 80645960. Its totient is φ = 80645958.

The previous prime is 80645951. The next prime is 80645969. The reversal of 80645959 is 95954608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80645959 - 2³ = 80645951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80645951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40322979 + 40322980.

It is an arithmetic number, because the mean of its divisors is an integer number (40322980).

Almost surely, 2^80645959 is an apocalyptic number.

80645959 is a deficient number, since it is larger than the sum of its proper divisors (1).

80645959 is an equidigital number, since it uses as much as digits as its factorization.

80645959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 80645959 is about 8980.3095158241. The cubic root of 80645959 is about 432.0435609223.

The spelling of 80645959 in words is "eighty million, six hundred forty-five thousand, nine hundred fifty-nine".