59987391 has 4 divisors (see below), whose sum is σ = 79983192. Its totient is φ = 39991592.

The previous prime is 59987377. The next prime is 59987393. The reversal of 59987391 is 19378995.

It is a happy number.

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 59987391 - 2⁵ = 59987359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (59987393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9997896 + ... + 9997901.

It is an arithmetic number, because the mean of its divisors is an integer number (19995798).

Almost surely, 2^59987391 is an apocalyptic number.

59987391 is a deficient number, since it is larger than the sum of its proper divisors (19995801).

59987391 is a wasteful number, since it uses less digits than its factorization.

59987391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19995800.

The product of its digits is 612360, while the sum is 51.

The square root of 59987391 is about 7745.1527421995. The cubic root of 59987391 is about 391.4593385478.

It can be divided in two parts, 59987 and 391, that added together give a triangular number (60378 = T₃₄₇).

The spelling of 59987391 in words is "fifty-nine million, nine hundred eighty-seven thousand, three hundred ninety-one".