80691942 has 8 divisors (see below), whose sum is σ = 161383896. Its totient is φ = 26897312.

The previous prime is 80691901. The next prime is 80691953. The reversal of 80691942 is 24919608.

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

80691942 is an admirable number.

It is a super-2 number, since 2×80691942² = 13022379007462728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80691942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6724323 + ... + 6724334.

It is an arithmetic number, because the mean of its divisors is an integer number (20172987).

Almost surely, 2^80691942 is an apocalyptic number.

80691942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

80691942 is a wasteful number, since it uses less digits than its factorization.

80691942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13448662.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 80691942 is about 8982.8693634050. The cubic root of 80691942 is about 432.1256600323.

It can be divided in two parts, 8069 and 1942, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 80691942 in words is "eighty million, six hundred ninety-one thousand, nine hundred forty-two".