80578513 has 2 divisors, whose sum is σ = 80578514. Its totient is φ = 80578512.

The previous prime is 80578481. The next prime is 80578529. The reversal of 80578513 is 31587508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65157184 + 15421329 = 8072^2 + 3927^2 .

It is a cyclic number.

It is not a de Polignac number, because 80578513 - 2⁵ = 80578481 is a prime.

It is not a weakly prime, because it can be changed into another prime (80578543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40289256 + 40289257.

It is an arithmetic number, because the mean of its divisors is an integer number (40289257).

Almost surely, 2^80578513 is an apocalyptic number.

It is an amenable number.

80578513 is a deficient number, since it is larger than the sum of its proper divisors (1).

80578513 is an equidigital number, since it uses as much as digits as its factorization.

80578513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 80578513 is about 8976.5535145734. The cubic root of 80578513 is about 431.9230848004.

The spelling of 80578513 in words is "eighty million, five hundred seventy-eight thousand, five hundred thirteen".