139622369 has 4 divisors (see below), whose sum is σ = 139834260. Its totient is φ = 139410480.

The previous prime is 139622363. The next prime is 139622381. The reversal of 139622369 is 963226931.

139622369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963226931 = 5101 ⋅188831.

It can be written as a sum of positive squares in 2 ways, for example, as 93219025 + 46403344 = 9655^2 + 6812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139622369 is a prime.

It is a super-2 number, since 2×139622369² = 38988811850344322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139622363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104954 + ... + 106275.

It is an arithmetic number, because the mean of its divisors is an integer number (34958565).

Almost surely, 2^139622369 is an apocalyptic number.

It is an amenable number.

139622369 is a deficient number, since it is larger than the sum of its proper divisors (211891).

139622369 is an equidigital number, since it uses as much as digits as its factorization.

139622369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211890.

The product of its digits is 104976, while the sum is 41.

The square root of 139622369 is about 11816.1909683282. The cubic root of 139622369 is about 518.7821215122.

The spelling of 139622369 in words is "one hundred thirty-nine million, six hundred twenty-two thousand, three hundred sixty-nine".