139050291 has 4 divisors (see below), whose sum is σ = 185400392. Its totient is φ = 92700192.

The previous prime is 139050287. The next prime is 139050337. The reversal of 139050291 is 192050931.

139050291 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.

It is not a de Polignac number, because 139050291 - 2² = 139050287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139050251) 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, 23175046 + ... + 23175051.

It is an arithmetic number, because the mean of its divisors is an integer number (46350098).

Almost surely, 2^139050291 is an apocalyptic number.

139050291 is a deficient number, since it is larger than the sum of its proper divisors (46350101).

139050291 is an equidigital number, since it uses as much as digits as its factorization.

139050291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46350100.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 139050291 is about 11791.9587431436. The cubic root of 139050291 is about 518.0726122227.

It can be divided in two parts, 1390 and 50291, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 139050291 in words is "one hundred thirty-nine million, fifty thousand, two hundred ninety-one".