139549379 has 4 divisors (see below), whose sum is σ = 147758184. Its totient is φ = 131340576.

The previous prime is 139549373. The next prime is 139549381. The reversal of 139549379 is 973945931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 139549379 - 2¹² = 139545283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139549373) 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, 4104377 + ... + 4104410.

It is an arithmetic number, because the mean of its divisors is an integer number (36939546).

Almost surely, 2^139549379 is an apocalyptic number.

139549379 is a deficient number, since it is larger than the sum of its proper divisors (8208805).

139549379 is an equidigital number, since it uses as much as digits as its factorization.

139549379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208804.

The product of its digits is 918540, while the sum is 50.

The square root of 139549379 is about 11813.1020058239. The cubic root of 139549379 is about 518.6917049894.

The spelling of 139549379 in words is "one hundred thirty-nine million, five hundred forty-nine thousand, three hundred seventy-nine".