80870399 has 2 divisors, whose sum is σ = 80870400. Its totient is φ = 80870398.

The previous prime is 80870389. The next prime is 80870417. The reversal of 80870399 is 99307808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80870399 - 2²⁰ = 79821823 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 (80870329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40435199 + 40435200.

It is an arithmetic number, because the mean of its divisors is an integer number (40435200).

Almost surely, 2^80870399 is an apocalyptic number.

80870399 is a deficient number, since it is larger than the sum of its proper divisors (1).

80870399 is an equidigital number, since it uses as much as digits as its factorization.

80870399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 80870399 is about 8992.7970620936. The cubic root of 80870399 is about 432.4439861970.

The spelling of 80870399 in words is "eighty million, eight hundred seventy thousand, three hundred ninety-nine".