745520919 has 32 divisors (see below), whose sum is σ = 1218599424. Its totient is φ = 398935680.

The previous prime is 745520911. The next prime is 745520939. The reversal of 745520919 is 919025547.

It is not a de Polignac number, because 745520919 - 2³ = 745520911 is a prime.

It is a super-2 number, since 2×745520919² = 1111602881333209122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745520911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27912 + ... + 47645.

It is an arithmetic number, because the mean of its divisors is an integer number (38081232).

Almost surely, 2^745520919 is an apocalyptic number.

745520919 is a deficient number, since it is larger than the sum of its proper divisors (473078505).

745520919 is a wasteful number, since it uses less digits than its factorization.

745520919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75607.

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 745520919 is about 27304.2289581669. The cubic root of 745520919 is about 906.7480104864.

The spelling of 745520919 in words is "seven hundred forty-five million, five hundred twenty thousand, nine hundred nineteen".