59991012 has 18 divisors (see below), whose sum is σ = 151644038. Its totient is φ = 19996992.

The previous prime is 59991007. The next prime is 59991013. The reversal of 59991012 is 21019995.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 28451556 = 5616^2 + 5334^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1666417 = 59991012 / (5 + 9 + 9 + 9 + 1 + 0 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (59991013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 833173 + ... + 833244.

Almost surely, 2^59991012 is an apocalyptic number.

It is an amenable number.

59991012 is an abundant number, since it is smaller than the sum of its proper divisors (91653026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

59991012 is a wasteful number, since it uses less digits than its factorization.

59991012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666427 (or 1666422 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The square root of 59991012 is about 7745.3864977805. The cubic root of 59991012 is about 391.4672149016.

The spelling of 59991012 in words is "fifty-nine million, nine hundred ninety-one thousand, twelve".