139621299 has 4 divisors (see below), whose sum is σ = 186161736. Its totient is φ = 93080864.

The previous prime is 139621297. The next prime is 139621319. The reversal of 139621299 is 992126931.

139621299 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: 992126931 = 3 ⋅330708977.

It is a cyclic number.

It is not a de Polignac number, because 139621299 - 2¹ = 139621297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139621299.

It is not an unprimeable number, because it can be changed into a prime (139621297) 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, 23270214 + ... + 23270219.

It is an arithmetic number, because the mean of its divisors is an integer number (46540434).

Almost surely, 2^139621299 is an apocalyptic number.

139621299 is a deficient number, since it is larger than the sum of its proper divisors (46540437).

139621299 is an equidigital number, since it uses as much as digits as its factorization.

139621299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46540436.

The product of its digits is 52488, while the sum is 42.

The square root of 139621299 is about 11816.1456913835. The cubic root of 139621299 is about 518.7807962750.

The spelling of 139621299 in words is "one hundred thirty-nine million, six hundred twenty-one thousand, two hundred ninety-nine".