745189385 has 4 divisors (see below), whose sum is σ = 894227268. Its totient is φ = 596151504.

The previous prime is 745189363. The next prime is 745189399. The reversal of 745189385 is 583981547.

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

It can be written as a sum of positive squares in 2 ways, for example, as 432182521 + 313006864 = 20789^2 + 17692^2 .

It is a cyclic number.

It is not a de Polignac number, because 745189385 - 2⁶ = 745189321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74518934 + ... + 74518943.

It is an arithmetic number, because the mean of its divisors is an integer number (223556817).

Almost surely, 2^745189385 is an apocalyptic number.

It is an amenable number.

745189385 is a deficient number, since it is larger than the sum of its proper divisors (149037883).

745189385 is a wasteful number, since it uses less digits than its factorization.

745189385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149037882.

The product of its digits is 1209600, while the sum is 50.

The square root of 745189385 is about 27298.1571722342. The cubic root of 745189385 is about 906.6135799337.

The spelling of 745189385 in words is "seven hundred forty-five million, one hundred eighty-nine thousand, three hundred eighty-five".