90284237 has 2 divisors, whose sum is σ = 90284238. Its totient is φ = 90284236.

The previous prime is 90284191. The next prime is 90284251. The reversal of 90284237 is 73248209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82337476 + 7946761 = 9074^2 + 2819^2 .

It is a cyclic number.

It is not a de Polignac number, because 90284237 - 2²² = 86089933 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90284197 and 90284206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90284737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45142118 + 45142119.

It is an arithmetic number, because the mean of its divisors is an integer number (45142119).

Almost surely, 2^90284237 is an apocalyptic number.

It is an amenable number.

90284237 is a deficient number, since it is larger than the sum of its proper divisors (1).

90284237 is an equidigital number, since it uses as much as digits as its factorization.

90284237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 90284237 is about 9501.8017765053. The cubic root of 90284237 is about 448.6117496341.

The spelling of 90284237 in words is "ninety million, two hundred eighty-four thousand, two hundred thirty-seven".