139374587 has 4 divisors (see below), whose sum is σ = 152045016. Its totient is φ = 126704160.

The previous prime is 139374583. The next prime is 139374589. The reversal of 139374587 is 785473931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785473931 = 11 ⋅71406721.

It is not a de Polignac number, because 139374587 - 2² = 139374583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139374581) 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, 6335198 + ... + 6335219.

It is an arithmetic number, because the mean of its divisors is an integer number (38011254).

Almost surely, 2^139374587 is an apocalyptic number.

139374587 is a deficient number, since it is larger than the sum of its proper divisors (12670429).

139374587 is a wasteful number, since it uses less digits than its factorization.

139374587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12670428.

The product of its digits is 635040, while the sum is 47.

The square root of 139374587 is about 11805.7014615820. The cubic root of 139374587 is about 518.4750527889.

The spelling of 139374587 in words is "one hundred thirty-nine million, three hundred seventy-four thousand, five hundred eighty-seven".