80981769 has 16 divisors (see below), whose sum is σ = 118056960. Its totient is φ = 48969360.

The previous prime is 80981767. The next prime is 80981779. The reversal of 80981769 is 96718908.

It is a happy number.

It is not a de Polignac number, because 80981769 - 2¹ = 80981767 is a prime.

It is a super-2 number, since 2×80981769² = 13116093820738722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80981767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13552 + ... + 18590.

It is an arithmetic number, because the mean of its divisors is an integer number (7378560).

Almost surely, 2^80981769 is an apocalyptic number.

It is an amenable number.

80981769 is a deficient number, since it is larger than the sum of its proper divisors (37075191).

80981769 is a wasteful number, since it uses less digits than its factorization.

80981769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 80981769 is about 8998.9871096696. The cubic root of 80981769 is about 432.6424073579.

The spelling of 80981769 in words is "eighty million, nine hundred eighty-one thousand, seven hundred sixty-nine".