80690563 has 2 divisors, whose sum is σ = 80690564. Its totient is φ = 80690562.

The previous prime is 80690537. The next prime is 80690567. The reversal of 80690563 is 36509608.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80690563 is a prime.

It is not a weakly prime, because it can be changed into another prime (80690567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40345281 + 40345282.

It is an arithmetic number, because the mean of its divisors is an integer number (40345282).

Almost surely, 2^80690563 is an apocalyptic number.

80690563 is a deficient number, since it is larger than the sum of its proper divisors (1).

80690563 is an equidigital number, since it uses as much as digits as its factorization.

80690563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 80690563 is about 8982.7926058660. The cubic root of 80690563 is about 432.1231983876.

The spelling of 80690563 in words is "eighty million, six hundred ninety thousand, five hundred sixty-three".