80989137 has 6 divisors (see below), whose sum is σ = 116984322. Its totient is φ = 53992752.

The previous prime is 80989133. The next prime is 80989147. The reversal of 80989137 is 73198908.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 31371201 = 7044^2 + 5601^2 .

It is not a de Polignac number, because 80989137 - 2² = 80989133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 80989092 and 80989101.

It is not an unprimeable number, because it can be changed into a prime (80989133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4499388 + ... + 4499405.

It is an arithmetic number, because the mean of its divisors is an integer number (19497387).

Almost surely, 2^80989137 is an apocalyptic number.

It is an amenable number.

80989137 is a deficient number, since it is larger than the sum of its proper divisors (35995185).

80989137 is a wasteful number, since it uses less digits than its factorization.

80989137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8998799 (or 8998796 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 80989137 is about 8999.3964797646. The cubic root of 80989137 is about 432.6555280583.

The spelling of 80989137 in words is "eighty million, nine hundred eighty-nine thousand, one hundred thirty-seven".