745409723 has 2 divisors, whose sum is σ = 745409724. Its totient is φ = 745409722.

The previous prime is 745409719. The next prime is 745409837. The reversal of 745409723 is 327904547.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 745409723 - 2² = 745409719 is a prime.

It is not a weakly prime, because it can be changed into another prime (745409023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372704861 + 372704862.

It is an arithmetic number, because the mean of its divisors is an integer number (372704862).

Almost surely, 2^745409723 is an apocalyptic number.

745409723 is a deficient number, since it is larger than the sum of its proper divisors (1).

745409723 is an equidigital number, since it uses as much as digits as its factorization.

745409723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 745409723 is about 27302.1926408851. The cubic root of 745409723 is about 906.7029271260.

The spelling of 745409723 in words is "seven hundred forty-five million, four hundred nine thousand, seven hundred twenty-three".