745406847 has 16 divisors (see below), whose sum is σ = 1134154080. Its totient is φ = 483506496.

The previous prime is 745406771. The next prime is 745406861. The reversal of 745406847 is 748604547.

745406847 is a `hidden beast` number, since 7 + 4 + 540 + 68 + 47 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-745406847 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745446847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372078 + ... + 374075.

It is an arithmetic number, because the mean of its divisors is an integer number (70884630).

Almost surely, 2^745406847 is an apocalyptic number.

745406847 is a deficient number, since it is larger than the sum of its proper divisors (388747233).

745406847 is a wasteful number, since it uses less digits than its factorization.

745406847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746199 (or 746193 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 745406847 is about 27302.1399710719. The cubic root of 745406847 is about 906.7017610196.

The spelling of 745406847 in words is "seven hundred forty-five million, four hundred six thousand, eight hundred forty-seven".