747999 has 24 divisors (see below), whose sum is σ = 1277952. Its totient is φ = 412560.

The previous prime is 747991. The next prime is 748003. The reversal of 747999 is 999747.

It is not a de Polignac number, because 747999 - 2³ = 747991 is a prime.

747999 is a modest number, since divided by 999 gives 747 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1762 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (53248).

2⁷⁴⁷⁹⁹⁹ is an apocalyptic number.

747999 is a deficient number, since it is larger than the sum of its proper divisors (529953).

747999 is a wasteful number, since it uses less digits than its factorization.

747999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 424 counting only the distinct ones).

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

The square root of 747999 is about 864.8693542958. The cubic root of 747999 is about 90.7751563799.

The spelling of 747999 in words is "seven hundred forty-seven thousand, nine hundred ninety-nine".