139186919 has 2 divisors, whose sum is σ = 139186920. Its totient is φ = 139186918.

The previous prime is 139186907. The next prime is 139186963. The reversal of 139186919 is 919681931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139186919 - 2⁴ = 139186903 is a prime.

It is a super-2 number, since 2×139186919² = 38745996841425122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139186219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69593459 + 69593460.

It is an arithmetic number, because the mean of its divisors is an integer number (69593460).

Almost surely, 2^139186919 is an apocalyptic number.

139186919 is a deficient number, since it is larger than the sum of its proper divisors (1).

139186919 is an equidigital number, since it uses as much as digits as its factorization.

139186919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 47.

The square root of 139186919 is about 11797.7505906846. The cubic root of 139186919 is about 518.2422392298.

The spelling of 139186919 in words is "one hundred thirty-nine million, one hundred eighty-six thousand, nine hundred nineteen".