745217973 has 12 divisors (see below), whose sum is σ = 1076812620. Its totient is φ = 496633536.

The previous prime is 745217971. The next prime is 745218043. The reversal of 745217973 is 379712547.

It can be written as a sum of positive squares in 2 ways, for example, as 495641169 + 249576804 = 22263^2 + 15798^2 .

It is not a de Polignac number, because 745217973 - 2¹ = 745217971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745217971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14665 + ... + 41297.

It is an arithmetic number, because the mean of its divisors is an integer number (89734385).

Almost surely, 2^745217973 is an apocalyptic number.

It is an amenable number.

745217973 is a deficient number, since it is larger than the sum of its proper divisors (331594647).

745217973 is a wasteful number, since it uses less digits than its factorization.

745217973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29748 (or 29745 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 745217973 is about 27298.6807923020. The cubic root of 745217973 is about 906.6251733792.

It can be divided in two parts, 7452 and 17973, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 745217973 in words is "seven hundred forty-five million, two hundred seventeen thousand, nine hundred seventy-three".