80691894 has 48 divisors (see below), whose sum is σ = 190146528. Its totient is φ = 24627456.

The previous prime is 80691887. The next prime is 80691901. The reversal of 80691894 is 49819608.

It is an interprime number because it is at equal distance from previous prime (80691887) and next prime (80691901).

It is a super-2 number, since 2×80691894² = 13022363514614472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7759 + ... + 14885.

It is an arithmetic number, because the mean of its divisors is an integer number (3961386).

Almost surely, 2^80691894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80691894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95073264).

80691894 is an abundant number, since it is smaller than the sum of its proper divisors (109454634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80691894 is a wasteful number, since it uses less digits than its factorization.

80691894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189 (or 7186 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 80691894 is about 8982.8666916525. The cubic root of 80691894 is about 432.1255743483.

The spelling of 80691894 in words is "eighty million, six hundred ninety-one thousand, eight hundred ninety-four".