745686503 has 2 divisors, whose sum is σ = 745686504. Its totient is φ = 745686502.

The previous prime is 745686497. The next prime is 745686523. The reversal of 745686503 is 305686547.

It is a weak prime.

It is an emirp because it is prime and its reverse (305686547) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745686503 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745686523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372843251 + 372843252.

It is an arithmetic number, because the mean of its divisors is an integer number (372843252).

Almost surely, 2^745686503 is an apocalyptic number.

745686503 is a deficient number, since it is larger than the sum of its proper divisors (1).

745686503 is an equidigital number, since it uses as much as digits as its factorization.

745686503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 44.

The square root of 745686503 is about 27307.2609941019. The cubic root of 745686503 is about 906.8151366369.

Adding to 745686503 its sum of digits (44), we get a palindrome (745686547).

The spelling of 745686503 in words is "seven hundred forty-five million, six hundred eighty-six thousand, five hundred three".