749205817 has 2 divisors, whose sum is σ = 749205818. Its totient is φ = 749205816.

The previous prime is 749205781. The next prime is 749205851. The reversal of 749205817 is 718502947.

Together with previous prime (749205781) 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., 747420921 + 1784896 = 27339^2 + 1336^2 .

It is a cyclic number.

It is not a de Polignac number, because 749205817 - 2⁷ = 749205689 is a prime.

It is a super-2 number, since 2×749205817² = 1122618712453274978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (749205857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374602908 + 374602909.

It is an arithmetic number, because the mean of its divisors is an integer number (374602909).

Almost surely, 2^749205817 is an apocalyptic number.

It is an amenable number.

749205817 is a deficient number, since it is larger than the sum of its proper divisors (1).

749205817 is an equidigital number, since it uses as much as digits as its factorization.

749205817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 749205817 is about 27371.6243032817. The cubic root of 749205817 is about 908.2394884240.

The spelling of 749205817 in words is "seven hundred forty-nine million, two hundred five thousand, eight hundred seventeen".