747681407 has 16 divisors (see below), whose sum is σ = 862944000. Its totient is φ = 640664640.

The previous prime is 747681391. The next prime is 747681427. The reversal of 747681407 is 704186747.

It is a happy number.

It is not a de Polignac number, because 747681407 - 2⁴ = 747681391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747681427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32603 + ... + 50579.

It is an arithmetic number, because the mean of its divisors is an integer number (53934000).

Almost surely, 2^747681407 is an apocalyptic number.

747681407 is a deficient number, since it is larger than the sum of its proper divisors (115262593).

747681407 is a wasteful number, since it uses less digits than its factorization.

747681407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18206.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 747681407 is about 27343.7635851395. The cubic root of 747681407 is about 907.6230714909.

The spelling of 747681407 in words is "seven hundred forty-seven million, six hundred eighty-one thousand, four hundred seven".