139031919 has 12 divisors (see below), whose sum is σ = 216272056. Its totient is φ = 85558032.

The previous prime is 139031917. The next prime is 139031927. The reversal of 139031919 is 919130931.

It is not a de Polignac number, because 139031919 - 2¹ = 139031917 is a prime.

It is a super-2 number, since 2×139031919² = 38659749001645122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139031917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594037 + ... + 594270.

Almost surely, 2^139031919 is an apocalyptic number.

139031919 is a deficient number, since it is larger than the sum of its proper divisors (77240137).

139031919 is a wasteful number, since it uses less digits than its factorization.

139031919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188326 (or 1188323 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 139031919 is about 11791.1797119711. The cubic root of 139031919 is about 518.0497944609.

The spelling of 139031919 in words is "one hundred thirty-nine million, thirty-one thousand, nine hundred nineteen".