90082121 has 2 divisors, whose sum is σ = 90082122. Its totient is φ = 90082120.

The previous prime is 90082117. The next prime is 90082163. The reversal of 90082121 is 12128009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 11316496 = 8875^2 + 3364^2 .

It is an emirp because it is prime and its reverse (12128009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90082121 - 2² = 90082117 is a prime.

It is a super-2 number, since 2×90082121² = 16229577047717282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90982121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45041060 + 45041061.

It is an arithmetic number, because the mean of its divisors is an integer number (45041061).

Almost surely, 2^90082121 is an apocalyptic number.

It is an amenable number.

90082121 is a deficient number, since it is larger than the sum of its proper divisors (1).

90082121 is an equidigital number, since it uses as much as digits as its factorization.

90082121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 90082121 is about 9491.1601503715. The cubic root of 90082121 is about 448.2767359752.

The spelling of 90082121 in words is "ninety million, eighty-two thousand, one hundred twenty-one".