139887393 has 8 divisors (see below), whose sum is σ = 186580608. Its totient is φ = 93226224.

The previous prime is 139887389. The next prime is 139887401. The reversal of 139887393 is 393788931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139887393 - 2² = 139887389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139687393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5371 + ... + 17567.

It is an arithmetic number, because the mean of its divisors is an integer number (23322576).

Almost surely, 2^139887393 is an apocalyptic number.

It is an amenable number.

139887393 is a deficient number, since it is larger than the sum of its proper divisors (46693215).

139887393 is a wasteful number, since it uses less digits than its factorization.

139887393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16023.

The product of its digits is 979776, while the sum is 51.

The square root of 139887393 is about 11827.4000946954. The cubic root of 139887393 is about 519.1101558943.

The spelling of 139887393 in words is "one hundred thirty-nine million, eight hundred eighty-seven thousand, three hundred ninety-three".