745206647 has 8 divisors (see below), whose sum is σ = 779349600. Its totient is φ = 711208960.

The previous prime is 745206617. The next prime is 745206673. The reversal of 745206647 is 746602547.

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

It is a cyclic number.

It is not a de Polignac number, because 745206647 - 2¹² = 745202551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745206617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25754 + ... + 46407.

It is an arithmetic number, because the mean of its divisors is an integer number (97418700).

Almost surely, 2^745206647 is an apocalyptic number.

745206647 is a deficient number, since it is larger than the sum of its proper divisors (34142953).

745206647 is a wasteful number, since it uses less digits than its factorization.

745206647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72633.

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 745206647 is about 27298.4733455921. The cubic root of 745206647 is about 906.6205803210.

The spelling of 745206647 in words is "seven hundred forty-five million, two hundred six thousand, six hundred forty-seven".