749899009 has 2 divisors, whose sum is σ = 749899010. Its totient is φ = 749899008.

The previous prime is 749898977. The next prime is 749899013. The reversal of 749899009 is 900998947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748569600 + 1329409 = 27360^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 749899009 - 2⁵ = 749898977 is a prime.

It is not a weakly prime, because it can be changed into another prime (749809009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374949504 + 374949505.

It is an arithmetic number, because the mean of its divisors is an integer number (374949505).

Almost surely, 2^749899009 is an apocalyptic number.

It is an amenable number.

749899009 is a deficient number, since it is larger than the sum of its proper divisors (1).

749899009 is an equidigital number, since it uses as much as digits as its factorization.

749899009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 749899009 is about 27384.2839782237. The cubic root of 749899009 is about 908.5195139575.

The spelling of 749899009 in words is "seven hundred forty-nine million, eight hundred ninety-nine thousand, nine".