749679839 has 4 divisors (see below), whose sum is σ = 753041856. Its totient is φ = 746317824.

The previous prime is 749679803. The next prime is 749679863. The reversal of 749679839 is 938976947.

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 749679839 - 2²⁸ = 481244383 is a prime.

It is a super-2 number, since 2×749679839² = 1124039722006131842, which contains 22 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 (749672839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680674 + ... + 1681119.

It is an arithmetic number, because the mean of its divisors is an integer number (188260464).

Almost surely, 2^749679839 is an apocalyptic number.

749679839 is a deficient number, since it is larger than the sum of its proper divisors (3362017).

749679839 is a wasteful number, since it uses less digits than its factorization.

749679839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362016.

The product of its digits is 20575296, while the sum is 62.

The square root of 749679839 is about 27380.2819379202. The cubic root of 749679839 is about 908.4309955387.

The spelling of 749679839 in words is "seven hundred forty-nine million, six hundred seventy-nine thousand, eight hundred thirty-nine".