2690644237 has 2 divisors, whose sum is σ = 2690644238. Its totient is φ = 2690644236.

The previous prime is 2690644217. The next prime is 2690644241. The reversal of 2690644237 is 7324460962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2151197161 + 539447076 = 46381^2 + 23226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2690644237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2690644193 and 2690644202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2690644217) 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, 1345322118 + 1345322119.

It is an arithmetic number, because the mean of its divisors is an integer number (1345322119).

Almost surely, 2^2690644237 is an apocalyptic number.

It is an amenable number.

2690644237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690644237 is an equidigital number, since it uses as much as digits as its factorization.

2690644237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 2690644237 is about 51871.4202331110. The cubic root of 2690644237 is about 1390.8664330529.

The spelling of 2690644237 in words is "two billion, six hundred ninety million, six hundred forty-four thousand, two hundred thirty-seven".