80870389 has 2 divisors, whose sum is σ = 80870390. Its totient is φ = 80870388.

The previous prime is 80870359. The next prime is 80870399. The reversal of 80870389 is 98307808.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42640900 + 38229489 = 6530^2 + 6183^2 .

It is a cyclic number.

It is not a de Polignac number, because 80870389 - 2¹⁵ = 80837621 is a prime.

It is a super-2 number, since 2×80870389² = 13080039634022642, which contains 22 as substring.

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, 40435194 + 40435195.

It is an arithmetic number, because the mean of its divisors is an integer number (40435195).

Almost surely, 2^80870389 is an apocalyptic number.

It is an amenable number.

80870389 is a deficient number, since it is larger than the sum of its proper divisors (1).

80870389 is an equidigital number, since it uses as much as digits as its factorization.

80870389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 80870389 is about 8992.7965060931. The cubic root of 80870389 is about 432.4439683725.

The spelling of 80870389 in words is "eighty million, eight hundred seventy thousand, three hundred eighty-nine".