2690645729 has 2 divisors, whose sum is σ = 2690645730. Its totient is φ = 2690645728.

The previous prime is 2690645677. The next prime is 2690645759. The reversal of 2690645729 is 9275460962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1374407329 + 1316238400 = 37073^2 + 36280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2690645729 is a prime.

It is not a weakly prime, because it can be changed into another prime (2690645759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345322864 + 1345322865.

It is an arithmetic number, because the mean of its divisors is an integer number (1345322865).

Almost surely, 2^2690645729 is an apocalyptic number.

It is an amenable number.

2690645729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690645729 is an equidigital number, since it uses as much as digits as its factorization.

2690645729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 2690645729 is about 51871.4346148244. The cubic root of 2690645729 is about 1390.8666901378.

The spelling of 2690645729 in words is "two billion, six hundred ninety million, six hundred forty-five thousand, seven hundred twenty-nine".