749670591 has 4 divisors (see below), whose sum is σ = 999560792. Its totient is φ = 499780392.

The previous prime is 749670563. The next prime is 749670599. The reversal of 749670591 is 195076947.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-749670591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 749670591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749670599) 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, 124945096 + ... + 124945101.

It is an arithmetic number, because the mean of its divisors is an integer number (249890198).

Almost surely, 2^749670591 is an apocalyptic number.

749670591 is a deficient number, since it is larger than the sum of its proper divisors (249890201).

749670591 is a wasteful number, since it uses less digits than its factorization.

749670591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249890200.

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 749670591 is about 27380.1130567425. The cubic root of 749670591 is about 908.4272600755.

It can be divided in two parts, 7496 and 70591, that added together give a palindrome (78087).

The spelling of 749670591 in words is "seven hundred forty-nine million, six hundred seventy thousand, five hundred ninety-one".