58978987 has 4 divisors (see below), whose sum is σ = 59320080. Its totient is φ = 58637896.

The previous prime is 58978981. The next prime is 58979003. The reversal of 58978987 is 78987985.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-58978987 is a prime.

It is a Duffinian 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, 170287 + ... + 170632.

It is an arithmetic number, because the mean of its divisors is an integer number (14830020).

Almost surely, 2^58978987 is an apocalyptic number.

58978987 is a deficient number, since it is larger than the sum of its proper divisors (341093).

58978987 is a wasteful number, since it uses less digits than its factorization.

58978987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341092.

The product of its digits is 10160640, while the sum is 61.

The square root of 58978987 is about 7679.7777962647. Note that the first 4 decimals coincide. The cubic root of 58978987 is about 389.2534194138.

It can be divided in two parts, 5897 and 8987, that added together give a square (14884 = 122²).

The spelling of 58978987 in words is "fifty-eight million, nine hundred seventy-eight thousand, nine hundred eighty-seven".