900647729 has 2 divisors, whose sum is σ = 900647730. Its totient is φ = 900647728.

The previous prime is 900647687. The next prime is 900647749. The reversal of 900647729 is 927746009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722158129 + 178489600 = 26873^2 + 13360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900647729 is a prime.

It is a super-2 number, since 2×900647729² = 1622332663505714882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 900647729.

It is not a weakly prime, because it can be changed into another prime (900647749) 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, 450323864 + 450323865.

It is an arithmetic number, because the mean of its divisors is an integer number (450323865).

Almost surely, 2^900647729 is an apocalyptic number.

It is an amenable number.

900647729 is a deficient number, since it is larger than the sum of its proper divisors (1).

900647729 is an equidigital number, since it uses as much as digits as its factorization.

900647729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 900647729 is about 30010.7935416576. The cubic root of 900647729 is about 965.7209496079.

The spelling of 900647729 in words is "nine hundred million, six hundred forty-seven thousand, seven hundred twenty-nine".