139695381 has 32 divisors (see below), whose sum is σ = 238726400. Its totient is φ = 79081920.

The previous prime is 139695373. The next prime is 139695419. The reversal of 139695381 is 183596931.

It is not a de Polignac number, because 139695381 - 2³ = 139695373 is a prime.

It is a super-2 number, since 2×139695381² = 39029598945470322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139695181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17211 + ... + 23991.

It is an arithmetic number, because the mean of its divisors is an integer number (7460200).

Almost surely, 2^139695381 is an apocalyptic number.

It is an amenable number.

139695381 is a deficient number, since it is larger than the sum of its proper divisors (99031019).

139695381 is a wasteful number, since it uses less digits than its factorization.

139695381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906 (or 6900 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 139695381 is about 11819.2800542165. The cubic root of 139695381 is about 518.8725337676.

The spelling of 139695381 in words is "one hundred thirty-nine million, six hundred ninety-five thousand, three hundred eighty-one".