80511993 has 12 divisors (see below), whose sum is σ = 116456340. Its totient is φ = 53600256.

The previous prime is 80511979. The next prime is 80512013. The reversal of 80511993 is 39911508.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43204329 + 37307664 = 6573^2 + 6108^2 .

It is not a de Polignac number, because 80511993 - 2⁵ = 80511961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80511923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1105 + ... + 12737.

It is an arithmetic number, because the mean of its divisors is an integer number (9704695).

Almost surely, 2^80511993 is an apocalyptic number.

It is an amenable number.

80511993 is a deficient number, since it is larger than the sum of its proper divisors (35944347).

80511993 is a wasteful number, since it uses less digits than its factorization.

80511993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12408 (or 12405 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 80511993 is about 8972.8475413327. The cubic root of 80511993 is about 431.8041968885.

The spelling of 80511993 in words is "eighty million, five hundred eleven thousand, nine hundred ninety-three".