80690537 has 2 divisors, whose sum is σ = 80690538. Its totient is φ = 80690536.

The previous prime is 80690513. The next prime is 80690563. The reversal of 80690537 is 73509608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78783376 + 1907161 = 8876^2 + 1381^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80690537 is a prime.

It is a super-2 number, since 2×80690537² = 13021925522696738, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80690537.

It is not a weakly prime, because it can be changed into another prime (80690507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40345268 + 40345269.

It is an arithmetic number, because the mean of its divisors is an integer number (40345269).

Almost surely, 2^80690537 is an apocalyptic number.

It is an amenable number.

80690537 is a deficient number, since it is larger than the sum of its proper divisors (1).

80690537 is an equidigital number, since it uses as much as digits as its factorization.

80690537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 80690537 is about 8982.7911586544. The cubic root of 80690537 is about 432.1231519749.

The spelling of 80690537 in words is "eighty million, six hundred ninety thousand, five hundred thirty-seven".