745218523 has 8 divisors (see below), whose sum is σ = 854690048. Its totient is φ = 636499944.

The previous prime is 745218457. The next prime is 745218553. The reversal of 745218523 is 325812547.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745218523 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745218553) 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, 186111 + ... + 190072.

It is an arithmetic number, because the mean of its divisors is an integer number (106836256).

Almost surely, 2^745218523 is an apocalyptic number.

745218523 is a deficient number, since it is larger than the sum of its proper divisors (109471525).

745218523 is a wasteful number, since it uses less digits than its factorization.

745218523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376473.

The product of its digits is 67200, while the sum is 37.

The square root of 745218523 is about 27298.6908660470. The cubic root of 745218523 is about 906.6253964208.

The spelling of 745218523 in words is "seven hundred forty-five million, two hundred eighteen thousand, five hundred twenty-three".