745138313 has 2 divisors, whose sum is σ = 745138314. Its totient is φ = 745138312.

The previous prime is 745138283. The next prime is 745138319. The reversal of 745138313 is 313831547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666052864 + 79085449 = 25808^2 + 8893^2 .

It is a cyclic number.

It is not a de Polignac number, because 745138313 - 2⁶ = 745138249 is a prime.

It is a super-2 number, since 2×745138313² = 1110462211000971938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (745138319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372569156 + 372569157.

It is an arithmetic number, because the mean of its divisors is an integer number (372569157).

Almost surely, 2^745138313 is an apocalyptic number.

It is an amenable number.

745138313 is a deficient number, since it is larger than the sum of its proper divisors (1).

745138313 is an equidigital number, since it uses as much as digits as its factorization.

745138313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 745138313 is about 27297.2217084450. The cubic root of 745138313 is about 906.5928676926.

The spelling of 745138313 in words is "seven hundred forty-five million, one hundred thirty-eight thousand, three hundred thirteen".