139741397 has 4 divisors (see below), whose sum is σ = 144249216. Its totient is φ = 135233580.

The previous prime is 139741361. The next prime is 139741429. The reversal of 139741397 is 793147931.

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 a cyclic number.

It is not a de Polignac number, because 139741397 - 2²⁰ = 138692821 is a prime.

It is a super-3 number, since 3×139741397³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139741097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253863 + ... + 2253924.

It is an arithmetic number, because the mean of its divisors is an integer number (36062304).

Almost surely, 2^139741397 is an apocalyptic number.

It is an amenable number.

139741397 is a deficient number, since it is larger than the sum of its proper divisors (4507819).

139741397 is an equidigital number, since it uses as much as digits as its factorization.

139741397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507818.

The product of its digits is 142884, while the sum is 44.

The square root of 139741397 is about 11821.2265438067. The cubic root of 139741397 is about 518.9295001401.

The spelling of 139741397 in words is "one hundred thirty-nine million, seven hundred forty-one thousand, three hundred ninety-seven".