80690513 has 2 divisors, whose sum is σ = 80690514. Its totient is φ = 80690512.

The previous prime is 80690507. The next prime is 80690537. The reversal of 80690513 is 31509608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52896529 + 27793984 = 7273^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 80690513 - 2⁴ = 80690497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80690513.

It is not a weakly prime, because it can be changed into another prime (80690563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40345256 + 40345257.

It is an arithmetic number, because the mean of its divisors is an integer number (40345257).

Almost surely, 2^80690513 is an apocalyptic number.

It is an amenable number.

80690513 is a deficient number, since it is larger than the sum of its proper divisors (1).

80690513 is an equidigital number, since it uses as much as digits as its factorization.

80690513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 80690513 is about 8982.7898227666. The cubic root of 80690513 is about 432.1231091323.

It can be divided in two parts, 806 and 90513, that added together give a palindrome (91319).

The spelling of 80690513 in words is "eighty million, six hundred ninety thousand, five hundred thirteen".