80846639 has 2 divisors, whose sum is σ = 80846640. Its totient is φ = 80846638.

The previous prime is 80846593. The next prime is 80846651. The reversal of 80846639 is 93664808.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80846639 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80846639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80846659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40423319 + 40423320.

It is an arithmetic number, because the mean of its divisors is an integer number (40423320).

Almost surely, 2^80846639 is an apocalyptic number.

80846639 is a deficient number, since it is larger than the sum of its proper divisors (1).

80846639 is an equidigital number, since it uses as much as digits as its factorization.

80846639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 80846639 is about 8991.4759077695. The cubic root of 80846639 is about 432.4016308743.

The spelling of 80846639 in words is "eighty million, eight hundred forty-six thousand, six hundred thirty-nine".