80981901 has 96 divisors (see below), whose sum is σ = 160392960. Its totient is φ = 38016000.

The previous prime is 80981869. The next prime is 80981917. The reversal of 80981901 is 10918908.

80981901 is a nontrivial binomial coefficient, being equal to C(12727, 2).

It is not a de Polignac number, because 80981901 - 2⁵ = 80981869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80981921) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 801751 + ... + 801851.

It is an arithmetic number, because the mean of its divisors is an integer number (1670760).

Almost surely, 2^80981901 is an apocalyptic number.

80981901 is the 12726-th triangular number.

It is an amenable number.

80981901 is a deficient number, since it is larger than the sum of its proper divisors (79411059).

80981901 is a wasteful number, since it uses less digits than its factorization.

80981901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 80981901 is about 8998.9944438254. The cubic root of 80981901 is about 432.6426424263.

It can be divided in two parts, 8098 and 1901, that added together give a palindrome (9999).

The spelling of 80981901 in words is "eighty million, nine hundred eighty-one thousand, nine hundred one".