139345891 has 8 divisors (see below), whose sum is σ = 145769760. Its totient is φ = 132952512.

The previous prime is 139345861. The next prime is 139345901. The reversal of 139345891 is 198543931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139345891 - 2⁵ = 139345859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139345861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001 + ... + 16813.

It is an arithmetic number, because the mean of its divisors is an integer number (18221220).

Almost surely, 2^139345891 is an apocalyptic number.

139345891 is a deficient number, since it is larger than the sum of its proper divisors (6423869).

139345891 is a wasteful number, since it uses less digits than its factorization.

139345891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15245.

The product of its digits is 116640, while the sum is 43.

The square root of 139345891 is about 11804.4860540389. The cubic root of 139345891 is about 518.4394671975.

The spelling of 139345891 in words is "one hundred thirty-nine million, three hundred forty-five thousand, eight hundred ninety-one".