747315309 has 16 divisors (see below), whose sum is σ = 1073568384. Its totient is φ = 459672000.

The previous prime is 747315293. The next prime is 747315313. The reversal of 747315309 is 903513747.

It is a happy number.

It is not a de Polignac number, because 747315309 - 2⁴ = 747315293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747315389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136984 + ... + 142334.

It is an arithmetic number, because the mean of its divisors is an integer number (67098024).

Almost surely, 2^747315309 is an apocalyptic number.

It is an amenable number.

747315309 is a deficient number, since it is larger than the sum of its proper divisors (326253075).

747315309 is a wasteful number, since it uses less digits than its factorization.

747315309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8948.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 747315309 is about 27337.0684053722. The cubic root of 747315309 is about 907.4749097936.

The spelling of 747315309 in words is "seven hundred forty-seven million, three hundred fifteen thousand, three hundred nine".