749951399 has 4 divisors (see below), whose sum is σ = 750367320. Its totient is φ = 749535480.

The previous prime is 749951393. The next prime is 749951401. The reversal of 749951399 is 993159947.

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 749951399 - 2²⁰ = 748902823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749951393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205244 + ... + 208865.

It is an arithmetic number, because the mean of its divisors is an integer number (187591830).

Almost surely, 2^749951399 is an apocalyptic number.

749951399 is a deficient number, since it is larger than the sum of its proper divisors (415921).

749951399 is a wasteful number, since it uses less digits than its factorization.

749951399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415920.

The product of its digits is 2755620, while the sum is 56.

The square root of 749951399 is about 27385.2405320822. The cubic root of 749951399 is about 908.5406706859.

The spelling of 749951399 in words is "seven hundred forty-nine million, nine hundred fifty-one thousand, three hundred ninety-nine".