139849253 has 4 divisors (see below), whose sum is σ = 147209760. Its totient is φ = 132488748.

The previous prime is 139849249. The next prime is 139849309. The reversal of 139849253 is 352948931.

139849253 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 139849253 - 2² = 139849249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139849243) 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, 3680225 + ... + 3680262.

It is an arithmetic number, because the mean of its divisors is an integer number (36802440).

Almost surely, 2^139849253 is an apocalyptic number.

It is an amenable number.

139849253 is a deficient number, since it is larger than the sum of its proper divisors (7360507).

139849253 is an equidigital number, since it uses as much as digits as its factorization.

139849253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7360506.

The product of its digits is 233280, while the sum is 44.

The square root of 139849253 is about 11825.7876270462. The cubic root of 139849253 is about 519.0629735129.

The spelling of 139849253 in words is "one hundred thirty-nine million, eight hundred forty-nine thousand, two hundred fifty-three".