745408813 has 2 divisors, whose sum is σ = 745408814. Its totient is φ = 745408812.

The previous prime is 745408789. The next prime is 745408831. The reversal of 745408813 is 318804547.

Together with next prime (745408831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 592094889 + 153313924 = 24333^2 + 12382^2 .

It is a cyclic number.

It is not a de Polignac number, because 745408813 - 2²¹ = 743311661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745498813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372704406 + 372704407.

It is an arithmetic number, because the mean of its divisors is an integer number (372704407).

Almost surely, 2^745408813 is an apocalyptic number.

It is an amenable number.

745408813 is a deficient number, since it is larger than the sum of its proper divisors (1).

745408813 is an equidigital number, since it uses as much as digits as its factorization.

745408813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 745408813 is about 27302.1759755518. The cubic root of 745408813 is about 906.7025581566.

The spelling of 745408813 in words is "seven hundred forty-five million, four hundred eight thousand, eight hundred thirteen".