80691573 has 8 divisors (see below), whose sum is σ = 107940448. Its totient is φ = 53618544.

The previous prime is 80691557. The next prime is 80691581. The reversal of 80691573 is 37519608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80691573 - 2⁴ = 80691557 is a prime.

It is a super-2 number, since 2×80691573² = 13022259906428658, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80691473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42886 + ... + 44727.

It is an arithmetic number, because the mean of its divisors is an integer number (13492556).

Almost surely, 2^80691573 is an apocalyptic number.

It is an amenable number.

80691573 is a deficient number, since it is larger than the sum of its proper divisors (27248875).

80691573 is a wasteful number, since it uses less digits than its factorization.

80691573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87923.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 80691573 is about 8982.8488242873. The cubic root of 80691573 is about 432.1250013353.

The spelling of 80691573 in words is "eighty million, six hundred ninety-one thousand, five hundred seventy-three".