80906690 has 16 divisors (see below), whose sum is σ = 146190528. Its totient is φ = 32238576.

The previous prime is 80906681. The next prime is 80906699. The reversal of 80906690 is 9660908.

It is an interprime number because it is at equal distance from previous prime (80906681) and next prime (80906699).

It is a super-2 number, since 2×80906690² = 13091784973512200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80906699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12752 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (9136908).

Almost surely, 2^80906690 is an apocalyptic number.

80906690 is a deficient number, since it is larger than the sum of its proper divisors (65283838).

80906690 is a wasteful number, since it uses less digits than its factorization.

80906690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31033.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 80906690 is about 8994.8146173226. The cubic root of 80906690 is about 432.5086636642.

The spelling of 80906690 in words is "eighty million, nine hundred six thousand, six hundred ninety".