745303939 has 4 divisors (see below), whose sum is σ = 755513656. Its totient is φ = 735094224.

The previous prime is 745303883. The next prime is 745303981. The reversal of 745303939 is 939303547.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 745303939 - 2¹⁵ = 745271171 is a prime.

It is a super-2 number, since 2×745303939² = 1110955922977831442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745303895 and 745303904.

It is not an unprimeable number, because it can be changed into a prime (745303439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5104749 + ... + 5104894.

It is an arithmetic number, because the mean of its divisors is an integer number (188878414).

Almost surely, 2^745303939 is an apocalyptic number.

745303939 is a deficient number, since it is larger than the sum of its proper divisors (10209717).

745303939 is a wasteful number, since it uses less digits than its factorization.

745303939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209716.

The product of its (nonzero) digits is 306180, while the sum is 43.

The square root of 745303939 is about 27300.2552918466. The cubic root of 745303939 is about 906.6600338477.

The spelling of 745303939 in words is "seven hundred forty-five million, three hundred three thousand, nine hundred thirty-nine".