747189729 has 144 divisors (see below), whose sum is σ = 1405931904. Its totient is φ = 377395200.

The previous prime is 747189719. The next prime is 747189743. The reversal of 747189729 is 927981747.

It is not a de Polignac number, because 747189729 - 2⁴ = 747189713 is a prime.

It is a super-2 number, since 2×747189729² = 1116584982246186882, which contains 22 as substring.

Its product of digits (1778112) is a multiple of the sum of its prime factors (168).

It is not an unprimeable number, because it can be changed into a prime (747189719) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10523764 + ... + 10523834.

It is an arithmetic number, because the mean of its divisors is an integer number (9763416).

Almost surely, 2^747189729 is an apocalyptic number.

It is an amenable number.

747189729 is a deficient number, since it is larger than the sum of its proper divisors (658742175).

747189729 is a wasteful number, since it uses less digits than its factorization.

747189729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 152 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 747189729 is about 27334.7714276158. The cubic root of 747189729 is about 907.4240757919.

The spelling of 747189729 in words is "seven hundred forty-seven million, one hundred eighty-nine thousand, seven hundred twenty-nine".