749979 has 20 divisors (see below), whose sum is σ = 1149984. Its totient is φ = 486864.

The previous prime is 749971. The next prime is 749993. The reversal of 749979 is 979947.

It is not a de Polignac number, because 749979 - 2³ = 749971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (749971) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3709 + ... + 3905.

2⁷⁴⁹⁹⁷⁹ is an apocalyptic number.

749979 is a deficient number, since it is larger than the sum of its proper divisors (400005).

749979 is a wasteful number, since it uses less digits than its factorization.

749979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 247 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 749979 is about 866.0132793439. The cubic root of 749979 is about 90.8551816441.

It can be divided in two parts, 749 and 979, that added together give a cube (1728 = 12³).

The spelling of 749979 in words is "seven hundred forty-nine thousand, nine hundred seventy-nine".