59899991 has 4 divisors (see below), whose sum is σ = 60459912. Its totient is φ = 59340072.

The previous prime is 59899963. The next prime is 59899999. The reversal of 59899991 is 19999895.

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 59899991 - 2²² = 55705687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 59899991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (59899999) 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, 279800 + ... + 280013.

It is an arithmetic number, because the mean of its divisors is an integer number (15114978).

Almost surely, 2^59899991 is an apocalyptic number.

59899991 is a deficient number, since it is larger than the sum of its proper divisors (559921).

59899991 is a wasteful number, since it uses less digits than its factorization.

59899991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559920.

The product of its digits is 2361960, while the sum is 59.

The square root of 59899991 is about 7739.5084469235. The cubic root of 59899991 is about 391.2691309328.

The spelling of 59899991 in words is "fifty-nine million, eight hundred ninety-nine thousand, nine hundred ninety-one".