139604269 has 4 divisors (see below), whose sum is σ = 159547744. Its totient is φ = 119660796.

The previous prime is 139604263. The next prime is 139604317. The reversal of 139604269 is 962406931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 962406931 = 163 ⋅5904337.

It is a cyclic number.

It is not a de Polignac number, because 139604269 - 2¹³ = 139596077 is a prime.

It is a super-2 number, since 2×139604269² = 38978703846048722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139604263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9971727 + ... + 9971740.

It is an arithmetic number, because the mean of its divisors is an integer number (39886936).

Almost surely, 2^139604269 is an apocalyptic number.

It is an amenable number.

139604269 is a deficient number, since it is larger than the sum of its proper divisors (19943475).

139604269 is an equidigital number, since it uses as much as digits as its factorization.

139604269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19943474.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 139604269 is about 11815.4250452533. The cubic root of 139604269 is about 518.7597030362.

The spelling of 139604269 in words is "one hundred thirty-nine million, six hundred four thousand, two hundred sixty-nine".