749509399 has 2 divisors, whose sum is σ = 749509400. Its totient is φ = 749509398.

The previous prime is 749509381. The next prime is 749509429. The reversal of 749509399 is 993905947.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 749509399 - 2⁵ = 749509367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749509309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374754699 + 374754700.

It is an arithmetic number, because the mean of its divisors is an integer number (374754700).

Almost surely, 2^749509399 is an apocalyptic number.

749509399 is a deficient number, since it is larger than the sum of its proper divisors (1).

749509399 is an equidigital number, since it uses as much as digits as its factorization.

749509399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 749509399 is about 27377.1693021759. The cubic root of 749509399 is about 908.3621462753.

The spelling of 749509399 in words is "seven hundred forty-nine million, five hundred nine thousand, three hundred ninety-nine".