745684613 has 8 divisors (see below), whose sum is σ = 761925528. Its totient is φ = 729524224.

The previous prime is 745684601. The next prime is 745684649. The reversal of 745684613 is 316486547.

745684613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 363169249 + 382515364 = 19057^2 + 19558^2 .

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

It is not a de Polignac number, because 745684613 - 2²⁴ = 728907397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745684213) 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, 1220 + ... + 38637.

It is an arithmetic number, because the mean of its divisors is an integer number (95240691).

Almost surely, 2^745684613 is an apocalyptic number.

It is an amenable number.

745684613 is a deficient number, since it is larger than the sum of its proper divisors (16240915).

745684613 is a wasteful number, since it uses less digits than its factorization.

745684613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40263.

The product of its digits is 483840, while the sum is 44.

The square root of 745684613 is about 27307.2263878996. The cubic root of 745684613 is about 906.8143705053.

The spelling of 745684613 in words is "seven hundred forty-five million, six hundred eighty-four thousand, six hundred thirteen".