745894639 has 8 divisors (see below), whose sum is σ = 853430048. Its totient is φ = 638604000.

The previous prime is 745894631. The next prime is 745894651. The reversal of 745894639 is 936498547.

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 745894639 - 2³ = 745894631 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 745894639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745894631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54612 + ... + 66889.

It is an arithmetic number, because the mean of its divisors is an integer number (106678756).

Almost surely, 2^745894639 is an apocalyptic number.

745894639 is a deficient number, since it is larger than the sum of its proper divisors (107535409).

745894639 is a wasteful number, since it uses less digits than its factorization.

745894639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122385.

The product of its digits is 6531840, while the sum is 55.

The square root of 745894639 is about 27311.0717292456. The cubic root of 745894639 is about 906.8994988619.

The spelling of 745894639 in words is "seven hundred forty-five million, eight hundred ninety-four thousand, six hundred thirty-nine".