747547445 has 8 divisors (see below), whose sum is σ = 921301944. Its totient is φ = 581874624.

The previous prime is 747547441. The next prime is 747547447. The reversal of 747547445 is 544745747.

It can be written as a sum of positive squares in 4 ways, for example, as 180821809 + 566725636 = 13447^2 + 23806^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 747547445 - 2² = 747547441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 747547445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747547441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020214 + ... + 2020583.

It is an arithmetic number, because the mean of its divisors is an integer number (115162743).

Almost surely, 2^747547445 is an apocalyptic number.

It is an amenable number.

747547445 is a deficient number, since it is larger than the sum of its proper divisors (173754499).

747547445 is a wasteful number, since it uses less digits than its factorization.

747547445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040839.

The product of its digits is 2195200, while the sum is 47.

The square root of 747547445 is about 27341.3138857664. The cubic root of 747547445 is about 907.5688620094.

The spelling of 747547445 in words is "seven hundred forty-seven million, five hundred forty-seven thousand, four hundred forty-five".