9972090637 has 2 divisors, whose sum is σ = 9972090638. Its totient is φ = 9972090636.

The previous prime is 9972090617. The next prime is 9972090659. The reversal of 9972090637 is 7360902799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8883816516 + 1088274121 = 94254^2 + 32989^2 .

It is an emirp because it is prime and its reverse (7360902799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9972090637 - 2³¹ = 7824606989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9972090607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986045318 + 4986045319.

It is an arithmetic number, because the mean of its divisors is an integer number (4986045319).

Almost surely, 2^9972090637 is an apocalyptic number.

It is an amenable number.

9972090637 is a deficient number, since it is larger than the sum of its proper divisors (1).

9972090637 is an equidigital number, since it uses as much as digits as its factorization.

9972090637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 9972090637 is about 99860.3556823227. The cubic root of 9972090637 is about 2152.4285258531.

The spelling of 9972090637 in words is "nine billion, nine hundred seventy-two million, ninety thousand, six hundred thirty-seven".