90895121 has 2 divisors, whose sum is σ = 90895122. Its totient is φ = 90895120.

The previous prime is 90895117. The next prime is 90895127. The reversal of 90895121 is 12159809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56085121 + 34810000 = 7489^2 + 5900^2 .

It is an emirp because it is prime and its reverse (12159809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90895121 - 2² = 90895117 is a prime.

It is not a weakly prime, because it can be changed into another prime (90895127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45447560 + 45447561.

It is an arithmetic number, because the mean of its divisors is an integer number (45447561).

Almost surely, 2^90895121 is an apocalyptic number.

It is an amenable number.

90895121 is a deficient number, since it is larger than the sum of its proper divisors (1).

90895121 is an equidigital number, since it uses as much as digits as its factorization.

90895121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 90895121 is about 9533.8932760966. The cubic root of 90895121 is about 449.6212797121.

The spelling of 90895121 in words is "ninety million, eight hundred ninety-five thousand, one hundred twenty-one".