747646745 has 8 divisors (see below), whose sum is σ = 902133960. Its totient is φ = 594812160.

The previous prime is 747646727. The next prime is 747646777. The reversal of 747646745 is 547646747.

It can be written as a sum of positive squares in 4 ways, for example, as 40246336 + 707400409 = 6344^2 + 26597^2 .

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

It is not a de Polignac number, because 747646745 - 2⁸ = 747646489 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 747646693 and 747646702.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 412160 + ... + 413969.

It is an arithmetic number, because the mean of its divisors is an integer number (112766745).

Almost surely, 2^747646745 is an apocalyptic number.

It is an amenable number.

747646745 is a deficient number, since it is larger than the sum of its proper divisors (154487215).

747646745 is a wasteful number, since it uses less digits than its factorization.

747646745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826315.

The product of its digits is 3951360, while the sum is 50.

The square root of 747646745 is about 27343.1297586798. The cubic root of 747646745 is about 907.6090456787.

The spelling of 747646745 in words is "seven hundred forty-seven million, six hundred forty-six thousand, seven hundred forty-five".