745523447 has 4 divisors (see below), whose sum is σ = 761385696. Its totient is φ = 729661200.

The previous prime is 745523431. The next prime is 745523461. The reversal of 745523447 is 744325547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744325547 = 7 ⋅106332221.

It is a cyclic number.

It is not a de Polignac number, because 745523447 - 2⁴ = 745523431 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 (745523407) 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 3 ways as a sum of consecutive naturals, for example, 7931054 + ... + 7931147.

It is an arithmetic number, because the mean of its divisors is an integer number (190346424).

Almost surely, 2^745523447 is an apocalyptic number.

745523447 is a deficient number, since it is larger than the sum of its proper divisors (15862249).

745523447 is a wasteful number, since it uses less digits than its factorization.

745523447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15862248.

The product of its digits is 470400, while the sum is 41.

The square root of 745523447 is about 27304.2752513228. The cubic root of 745523447 is about 906.7490353879.

The spelling of 745523447 in words is "seven hundred forty-five million, five hundred twenty-three thousand, four hundred forty-seven".