80517953 has 4 divisors (see below), whose sum is σ = 84755760. Its totient is φ = 76280148.

The previous prime is 80517929. The next prime is 80517989. The reversal of 80517953 is 35971508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80517953 - 2²⁶ = 13409089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80517923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118875 + ... + 2118912.

It is an arithmetic number, because the mean of its divisors is an integer number (21188940).

Almost surely, 2^80517953 is an apocalyptic number.

It is an amenable number.

80517953 is a deficient number, since it is larger than the sum of its proper divisors (4237807).

80517953 is a wasteful number, since it uses less digits than its factorization.

80517953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237806.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 80517953 is about 8973.1796482629. The cubic root of 80517953 is about 431.8148515724.

The spelling of 80517953 in words is "eighty million, five hundred seventeen thousand, nine hundred fifty-three".