90512642293 has 2 divisors, whose sum is σ = 90512642294. Its totient is φ = 90512642292.

The previous prime is 90512642291. The next prime is 90512642303. The reversal of 90512642293 is 39224621509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87203861809 + 3308780484 = 295303^2 + 57522^2 .

It is a cyclic number.

It is not a de Polignac number, because 90512642293 - 2¹ = 90512642291 is a prime.

Together with 90512642291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90512642291) 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, 45256321146 + 45256321147.

It is an arithmetic number, because the mean of its divisors is an integer number (45256321147).

Almost surely, 2^90512642293 is an apocalyptic number.

It is an amenable number.

90512642293 is a deficient number, since it is larger than the sum of its proper divisors (1).

90512642293 is an equidigital number, since it uses as much as digits as its factorization.

90512642293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 90512642293 in words is "ninety billion, five hundred twelve million, six hundred forty-two thousand, two hundred ninety-three".