139966885 has 8 divisors (see below), whose sum is σ = 169447320. Its totient is φ = 110982144.

The previous prime is 139966877. The next prime is 139966889. The reversal of 139966885 is 588669931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10962721 + 129004164 = 3311^2 + 11358^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 139966885 - 2³ = 139966877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139966889) 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, 123300 + ... + 124429.

It is an arithmetic number, because the mean of its divisors is an integer number (21180915).

Almost surely, 2^139966885 is an apocalyptic number.

It is an amenable number.

139966885 is a deficient number, since it is larger than the sum of its proper divisors (29480435).

139966885 is a wasteful number, since it uses less digits than its factorization.

139966885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247847.

The product of its digits is 2799360, while the sum is 55.

The square root of 139966885 is about 11830.7601192823. The cubic root of 139966885 is about 519.2084666134.

The spelling of 139966885 in words is "one hundred thirty-nine million, nine hundred sixty-six thousand, eight hundred eighty-five".