80694539 has 4 divisors (see below), whose sum is σ = 84941640. Its totient is φ = 76447440.

The previous prime is 80694533. The next prime is 80694547. The reversal of 80694539 is 93549608.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80694539 - 2⁸ = 80694283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80694539.

It is not an unprimeable number, because it can be changed into a prime (80694533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2123522 + ... + 2123559.

It is an arithmetic number, because the mean of its divisors is an integer number (21235410).

Almost surely, 2^80694539 is an apocalyptic number.

80694539 is a deficient number, since it is larger than the sum of its proper divisors (4247101).

80694539 is a wasteful number, since it uses less digits than its factorization.

80694539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4247100.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 80694539 is about 8983.0139151623. The cubic root of 80694539 is about 432.1302958455.

The spelling of 80694539 in words is "eighty million, six hundred ninety-four thousand, five hundred thirty-nine".