3900564637 has 2 divisors, whose sum is σ = 3900564638. Its totient is φ = 3900564636.

The previous prime is 3900564617. The next prime is 3900564659. The reversal of 3900564637 is 7364650093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2310628761 + 1589935876 = 48069^2 + 39874^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900564637 - 2¹⁹ = 3900040349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3900564593 and 3900564602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3900564617) 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, 1950282318 + 1950282319.

It is an arithmetic number, because the mean of its divisors is an integer number (1950282319).

Almost surely, 2^3900564637 is an apocalyptic number.

It is an amenable number.

3900564637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3900564637 is an equidigital number, since it uses as much as digits as its factorization.

3900564637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 43.

The square root of 3900564637 is about 62454.5005343890. The cubic root of 3900564637 is about 1574.1368764729.

The spelling of 3900564637 in words is "three billion, nine hundred million, five hundred sixty-four thousand, six hundred thirty-seven".