80449957 has 16 divisors (see below), whose sum is σ = 93829120. Its totient is φ = 67557888.

The previous prime is 80449949. The next prime is 80449969. The reversal of 80449957 is 75994408.

It is a cyclic number.

It is not a de Polignac number, because 80449957 - 2³ = 80449949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80449907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73468 + ... + 74554.

It is an arithmetic number, because the mean of its divisors is an integer number (5864320).

Almost surely, 2^80449957 is an apocalyptic number.

It is an amenable number.

80449957 is a deficient number, since it is larger than the sum of its proper divisors (13379163).

80449957 is a wasteful number, since it uses less digits than its factorization.

80449957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 80449957 is about 8969.3900015553. The cubic root of 80449957 is about 431.6932639820.

It can be divided in two parts, 80449 and 957, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 80449957 in words is "eighty million, four hundred forty-nine thousand, nine hundred fifty-seven".