80604981 has 12 divisors (see below), whose sum is σ = 119576652. Its totient is φ = 52284096.

The previous prime is 80604961. The next prime is 80604989. The reversal of 80604981 is 18940608.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30902481 + 49702500 = 5559^2 + 7050^2 .

It is not a de Polignac number, because 80604981 - 2⁶ = 80604917 is a prime.

It is a super-2 number, since 2×80604981² = 12994325924020722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80604989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120696 + ... + 121361.

It is an arithmetic number, because the mean of its divisors is an integer number (9964721).

Almost surely, 2^80604981 is an apocalyptic number.

It is an amenable number.

80604981 is a deficient number, since it is larger than the sum of its proper divisors (38971671).

80604981 is a wasteful number, since it uses less digits than its factorization.

80604981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242100 (or 242097 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80604981 is about 8978.0276787277. The cubic root of 80604981 is about 431.9703715534.

It can be divided in two parts, 8060 and 4981, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 80604981 in words is "eighty million, six hundred four thousand, nine hundred eighty-one".