80765389 has 2 divisors, whose sum is σ = 80765390. Its totient is φ = 80765388.

The previous prime is 80765387. The next prime is 80765393. The reversal of 80765389 is 98356708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 36808489 = 6630^2 + 6067^2 .

It is a cyclic number.

It is not a de Polignac number, because 80765389 - 2¹ = 80765387 is a prime.

Together with 80765387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80765381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40382694 + 40382695.

It is an arithmetic number, because the mean of its divisors is an integer number (40382695).

Almost surely, 2^80765389 is an apocalyptic number.

It is an amenable number.

80765389 is a deficient number, since it is larger than the sum of its proper divisors (1).

80765389 is an equidigital number, since it uses as much as digits as its factorization.

80765389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 80765389 is about 8986.9566038788. The cubic root of 80765389 is about 432.2567293306.

The spelling of 80765389 in words is "eighty million, seven hundred sixty-five thousand, three hundred eighty-nine".