90189791909267 has 2 divisors, whose sum is σ = 90189791909268. Its totient is φ = 90189791909266.

The previous prime is 90189791909249. The next prime is 90189791909293. The reversal of 90189791909267 is 76290919798109.

It is a weak prime.

It is an emirp because it is prime and its reverse (76290919798109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90189791909267 - 2²² = 90189787714963 is a prime.

It is not a weakly prime, because it can be changed into another prime (90189791909207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45094895954633 + 45094895954634.

It is an arithmetic number, because the mean of its divisors is an integer number (45094895954634).

Almost surely, 2^{90189791909267} is an apocalyptic number.

90189791909267 is a deficient number, since it is larger than the sum of its proper divisors (1).

90189791909267 is an equidigital number, since it uses as much as digits as its factorization.

90189791909267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277766496, while the sum is 77.

The spelling of 90189791909267 in words is "ninety trillion, one hundred eighty-nine billion, seven hundred ninety-one million, nine hundred nine thousand, two hundred sixty-seven".