39990000637 has 2 divisors, whose sum is σ = 39990000638. Its totient is φ = 39990000636.

The previous prime is 39990000607. The next prime is 39990000667. The reversal of 39990000637 is 73600009993.

It is a balanced prime because it is at equal distance from previous prime (39990000607) and next prime (39990000667).

It can be written as a sum of positive squares in only one way, i.e., 28597853881 + 11392146756 = 169109^2 + 106734^2 .

It is an emirp because it is prime and its reverse (73600009993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39990000637 - 2³¹ = 37842516989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39990000607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19995000318 + 19995000319.

It is an arithmetic number, because the mean of its divisors is an integer number (19995000319).

Almost surely, 2^39990000637 is an apocalyptic number.

It is an amenable number.

39990000637 is a deficient number, since it is larger than the sum of its proper divisors (1).

39990000637 is an equidigital number, since it uses as much as digits as its factorization.

39990000637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 46.

The spelling of 39990000637 in words is "thirty-nine billion, nine hundred ninety million, six hundred thirty-seven", and thus it is an aban number.