744252139 has 4 divisors (see below), whose sum is σ = 746360856. Its totient is φ = 742143424.

The previous prime is 744252121. The next prime is 744252167. The reversal of 744252139 is 931252447.

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 744252139 - 2⁷ = 744252011 is a prime.

It is a super-2 number, since 2×744252139² = 1107822492812150642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 744252098 and 744252107.

It is not an unprimeable number, because it can be changed into a prime (744262139) 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, 1053829 + ... + 1054534.

It is an arithmetic number, because the mean of its divisors is an integer number (186590214).

Almost surely, 2^744252139 is an apocalyptic number.

744252139 is a deficient number, since it is larger than the sum of its proper divisors (2108717).

744252139 is a wasteful number, since it uses less digits than its factorization.

744252139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108716.

The product of its digits is 60480, while the sum is 37.

The square root of 744252139 is about 27280.9849345657. The cubic root of 744252139 is about 906.2333291963.

The spelling of 744252139 in words is "seven hundred forty-four million, two hundred fifty-two thousand, one hundred thirty-nine".