60139687 has 4 divisors (see below), whose sum is σ = 62754480. Its totient is φ = 57524896.

The previous prime is 60139679. The next prime is 60139691. The reversal of 60139687 is 78693106.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78693106 = 2 ⋅39346553.

It is a cyclic number.

It is not a de Polignac number, because 60139687 - 2³ = 60139679 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60139637) 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, 1307362 + ... + 1307407.

It is an arithmetic number, because the mean of its divisors is an integer number (15688620).

Almost surely, 2^60139687 is an apocalyptic number.

60139687 is a deficient number, since it is larger than the sum of its proper divisors (2614793).

60139687 is a wasteful number, since it uses less digits than its factorization.

60139687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2614792.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 60139687 is about 7754.9782075774. The cubic root of 60139687 is about 391.7903376072.

The spelling of 60139687 in words is "sixty million, one hundred thirty-nine thousand, six hundred eighty-seven".