749641979 has 8 divisors (see below), whose sum is σ = 835514640. Its totient is φ = 668411136.

The previous prime is 749641939. The next prime is 749641987. The reversal of 749641979 is 979146947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749641979 is a prime.

It is a super-3 number, since 3×749641979³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (749641939) 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 7 ways as a sum of consecutive naturals, for example, 1160114 + ... + 1160759.

It is an arithmetic number, because the mean of its divisors is an integer number (104439330).

Almost surely, 2^749641979 is an apocalyptic number.

749641979 is a deficient number, since it is larger than the sum of its proper divisors (85872661).

749641979 is a wasteful number, since it uses less digits than its factorization.

749641979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320909.

The product of its digits is 3429216, while the sum is 56.

The square root of 749641979 is about 27379.5905557406. The cubic root of 749641979 is about 908.4157028877.

The spelling of 749641979 in words is "seven hundred forty-nine million, six hundred forty-one thousand, nine hundred seventy-nine".