745940849 has 4 divisors (see below), whose sum is σ = 746296320. Its totient is φ = 745585380.

The previous prime is 745940821. The next prime is 745940861. The reversal of 745940849 is 948049547.

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: 948049547 = 113 ⋅8389819.

It is a cyclic number.

It is not a de Polignac number, because 745940849 - 2¹⁶ = 745875313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745940797 and 745940806.

It is not an unprimeable number, because it can be changed into a prime (745949849) 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, 174569 + ... + 178790.

It is an arithmetic number, because the mean of its divisors is an integer number (186574080).

Almost surely, 2^745940849 is an apocalyptic number.

It is an amenable number.

745940849 is a deficient number, since it is larger than the sum of its proper divisors (355471).

745940849 is a wasteful number, since it uses less digits than its factorization.

745940849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355470.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 745940849 is about 27311.9177100401. The cubic root of 745940849 is about 906.9182266903.

The spelling of 745940849 in words is "seven hundred forty-five million, nine hundred forty thousand, eight hundred forty-nine".