139938419 has 2 divisors, whose sum is σ = 139938420. Its totient is φ = 139938418.

The previous prime is 139938397. The next prime is 139938431. The reversal of 139938419 is 914839931.

139938419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (914839931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139938419 - 2⁸ = 139938163 is a prime.

It is a super-2 number, since 2×139938419² = 39165522224439122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139938479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69969209 + 69969210.

It is an arithmetic number, because the mean of its divisors is an integer number (69969210).

Almost surely, 2^139938419 is an apocalyptic number.

139938419 is a deficient number, since it is larger than the sum of its proper divisors (1).

139938419 is an equidigital number, since it uses as much as digits as its factorization.

139938419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 139938419 is about 11829.5570077666. The cubic root of 139938419 is about 519.1732659293.

The spelling of 139938419 in words is "one hundred thirty-nine million, nine hundred thirty-eight thousand, four hundred nineteen".