749417779 has 16 divisors (see below), whose sum is σ = 871488000. Its totient is φ = 637247520.

The previous prime is 749417771. The next prime is 749417807. The reversal of 749417779 is 977714947.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 749417779 - 2³ = 749417771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749417771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6184 + ... + 39205.

It is an arithmetic number, because the mean of its divisors is an integer number (54468000).

Almost surely, 2^749417779 is an apocalyptic number.

749417779 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

749417779 is a deficient number, since it is larger than the sum of its proper divisors (122070221).

749417779 is a wasteful number, since it uses less digits than its factorization.

749417779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45498.

The product of its digits is 3111696, while the sum is 55.

The square root of 749417779 is about 27375.4959589776. The cubic root of 749417779 is about 908.3251320491.

It can be divided in two parts, 7494177 and 79, that added together give a triangular number (7494256 = T₃₈₇₁).

The spelling of 749417779 in words is "seven hundred forty-nine million, four hundred seventeen thousand, seven hundred seventy-nine".