749949869 has 2 divisors, whose sum is σ = 749949870. Its totient is φ = 749949868.

The previous prime is 749949857. The next prime is 749949973. The reversal of 749949869 is 968949947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732351844 + 17598025 = 27062^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 749949869 - 2⁴ = 749949853 is a prime.

It is a super-2 number, since 2×749949869² = 1124849612026234322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (749949269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374974934 + 374974935.

It is an arithmetic number, because the mean of its divisors is an integer number (374974935).

Almost surely, 2^749949869 is an apocalyptic number.

It is an amenable number.

749949869 is a deficient number, since it is larger than the sum of its proper divisors (1).

749949869 is an equidigital number, since it uses as much as digits as its factorization.

749949869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 65.

The square root of 749949869 is about 27385.2125973124. The cubic root of 749949869 is about 908.5400528378.

The spelling of 749949869 in words is "seven hundred forty-nine million, nine hundred forty-nine thousand, eight hundred sixty-nine".