139036619 has 4 divisors (see below), whose sum is σ = 139113744. Its totient is φ = 138959496.

The previous prime is 139036613. The next prime is 139036657. The reversal of 139036619 is 916630931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916630931 = 9871 ⋅92861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139036619 is a prime.

It is a super-2 number, since 2×139036619² = 38662362845902322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139036613) 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 3 ways as a sum of consecutive naturals, for example, 35792 + ... + 39485.

It is an arithmetic number, because the mean of its divisors is an integer number (34778436).

Almost surely, 2^139036619 is an apocalyptic number.

139036619 is a deficient number, since it is larger than the sum of its proper divisors (77125).

139036619 is an equidigital number, since it uses as much as digits as its factorization.

139036619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77124.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 139036619 is about 11791.3790118035. The cubic root of 139036619 is about 518.0556319851.

The spelling of 139036619 in words is "one hundred thirty-nine million, thirty-six thousand, six hundred nineteen".