10139931 has 8 divisors (see below), whose sum is σ = 15022160. Its totient is φ = 6759936.

The previous prime is 10139929. The next prime is 10139953. The reversal of 10139931 is 13993101.

It is not a de Polignac number, because 10139931 - 2¹ = 10139929 is a prime.

It is a super-2 number, since 2×10139931² = 205636401369522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 375553 = 10139931 / (1 + 0 + 1 + 3 + 9 + 9 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10139895 and 10139904.

It is not an unprimeable number, because it can be changed into a prime (10139231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187750 + ... + 187803.

It is an arithmetic number, because the mean of its divisors is an integer number (1877770).

Almost surely, 2^10139931 is an apocalyptic number.

10139931 is a deficient number, since it is larger than the sum of its proper divisors (4882229).

10139931 is an equidigital number, since it uses as much as digits as its factorization.

10139931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375562 (or 375556 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 10139931 is about 3184.3258313181. The cubic root of 10139931 is about 216.4437251843.

The spelling of 10139931 in words is "ten million, one hundred thirty-nine thousand, nine hundred thirty-one".