80919523 has 4 divisors (see below), whose sum is σ = 81330480. Its totient is φ = 80508568.

The previous prime is 80919493. The next prime is 80919533. The reversal of 80919523 is 32591908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80919523 - 2⁵ = 80919491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80919533) 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, 205183 + ... + 205576.

It is an arithmetic number, because the mean of its divisors is an integer number (20332620).

Almost surely, 2^80919523 is an apocalyptic number.

80919523 is a deficient number, since it is larger than the sum of its proper divisors (410957).

80919523 is a wasteful number, since it uses less digits than its factorization.

80919523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410956.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 80919523 is about 8995.5279444844. The cubic root of 80919523 is about 432.5315298831.

The spelling of 80919523 in words is "eighty million, nine hundred nineteen thousand, five hundred twenty-three".