90945401293 has 2 divisors, whose sum is σ = 90945401294. Its totient is φ = 90945401292.

The previous prime is 90945401257. The next prime is 90945401297. The reversal of 90945401293 is 39210454909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63180844164 + 27764557129 = 251358^2 + 166627^2 .

It is an emirp because it is prime and its reverse (39210454909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90945401293 - 2¹³ = 90945393101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90945401297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45472700646 + 45472700647.

It is an arithmetic number, because the mean of its divisors is an integer number (45472700647).

Almost surely, 2^90945401293 is an apocalyptic number.

It is an amenable number.

90945401293 is a deficient number, since it is larger than the sum of its proper divisors (1).

90945401293 is an equidigital number, since it uses as much as digits as its factorization.

90945401293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 90945401293 in words is "ninety billion, nine hundred forty-five million, four hundred one thousand, two hundred ninety-three".