745711531 has 2 divisors, whose sum is σ = 745711532. Its totient is φ = 745711530.

The previous prime is 745711529. The next prime is 745711609. The reversal of 745711531 is 135117547.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 745711531 - 2¹ = 745711529 is a prime.

It is a super-2 number, since 2×745711531² = 1112171374932727922, which contains 22 as substring.

Together with 745711529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (745711501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372855765 + 372855766.

It is an arithmetic number, because the mean of its divisors is an integer number (372855766).

Almost surely, 2^745711531 is an apocalyptic number.

745711531 is a deficient number, since it is larger than the sum of its proper divisors (1).

745711531 is an equidigital number, since it uses as much as digits as its factorization.

745711531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 745711531 is about 27307.7192566498. The cubic root of 745711531 is about 906.8252818812.

The spelling of 745711531 in words is "seven hundred forty-five million, seven hundred eleven thousand, five hundred thirty-one".