749344991 has 4 divisors (see below), whose sum is σ = 781925232. Its totient is φ = 716764752.

The previous prime is 749344919. The next prime is 749344993. The reversal of 749344991 is 199443947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199443947 = 103 ⋅1936349.

It is a cyclic number.

It is not a de Polignac number, because 749344991 - 2¹⁰ = 749343967 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 (749344993) 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, 16290086 + ... + 16290131.

It is an arithmetic number, because the mean of its divisors is an integer number (195481308).

Almost surely, 2^749344991 is an apocalyptic number.

749344991 is a deficient number, since it is larger than the sum of its proper divisors (32580241).

749344991 is a wasteful number, since it uses less digits than its factorization.

749344991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32580240.

The product of its digits is 979776, while the sum is 50.

The square root of 749344991 is about 27374.1664895938. The cubic root of 749344991 is about 908.2957237484.

The spelling of 749344991 in words is "seven hundred forty-nine million, three hundred forty-four thousand, nine hundred ninety-one".