58978991 has 4 divisors (see below), whose sum is σ = 58995000. Its totient is φ = 58962984.

The previous prime is 58978981. The next prime is 58979003. The reversal of 58978991 is 19987985.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19987985 = 5 ⋅3997597.

It is a cyclic number.

It is not a de Polignac number, because 58978991 - 2²² = 54784687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58978981) 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, 620 + ... + 10878.

It is an arithmetic number, because the mean of its divisors is an integer number (14748750).

Almost surely, 2^58978991 is an apocalyptic number.

58978991 is a deficient number, since it is larger than the sum of its proper divisors (16009).

58978991 is a wasteful number, since it uses less digits than its factorization.

58978991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16008.

The product of its digits is 1632960, while the sum is 56.

The square root of 58978991 is about 7679.7780566889. The cubic root of 58978991 is about 389.2534282136.

The spelling of 58978991 in words is "fifty-eight million, nine hundred seventy-eight thousand, nine hundred ninety-one".