745405889 has 4 divisors (see below), whose sum is σ = 745560000. Its totient is φ = 745251780.

The previous prime is 745405877. The next prime is 745405901. The reversal of 745405889 is 988504547.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988504547 = 41 ⋅24109867.

It is an interprime number because it is at equal distance from previous prime (745405877) and next prime (745405901).

It is a cyclic number.

It is not a de Polignac number, because 745405889 - 2²⁴ = 728628673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745405189) 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, 69557 + ... + 79554.

It is an arithmetic number, because the mean of its divisors is an integer number (186390000).

Almost surely, 2^745405889 is an apocalyptic number.

It is an amenable number.

745405889 is a deficient number, since it is larger than the sum of its proper divisors (154111).

745405889 is a wasteful number, since it uses less digits than its factorization.

745405889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154110.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The square root of 745405889 is about 27302.1224266539. The cubic root of 745405889 is about 906.7013725872.

The spelling of 745405889 in words is "seven hundred forty-five million, four hundred five thousand, eight hundred eighty-nine".