747399 has 4 divisors (see below), whose sum is σ = 996536. Its totient is φ = 498264.

The previous prime is 747391. The next prime is 747401. The reversal of 747399 is 993747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993747 = 3 ⋅331249.

It is not a de Polignac number, because 747399 - 2³ = 747391 is a prime.

It is a D-number.

It is a Duffinian number.

747399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124564 + ... + 124569.

It is an arithmetic number, because the mean of its divisors is an integer number (249134).

2⁷⁴⁷³⁹⁹ is an apocalyptic number.

747399 is a deficient number, since it is larger than the sum of its proper divisors (249137).

747399 is a wasteful number, since it uses less digits than its factorization.

747399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249136.

The product of its digits is 47628, while the sum is 39.

The square root of 747399 is about 864.5224115082. The cubic root of 747399 is about 90.7508784227.

The spelling of 747399 in words is "seven hundred forty-seven thousand, three hundred ninety-nine".