90655637 has 2 divisors, whose sum is σ = 90655638. Its totient is φ = 90655636.

The previous prime is 90655619. The next prime is 90655639. The reversal of 90655637 is 73655609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81468676 + 9186961 = 9026^2 + 3031^2 .

It is a cyclic number.

It is not a de Polignac number, because 90655637 - 2⁶ = 90655573 is a prime.

Together with 90655639, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90655594 and 90655603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90655639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45327818 + 45327819.

It is an arithmetic number, because the mean of its divisors is an integer number (45327819).

Almost surely, 2^90655637 is an apocalyptic number.

It is an amenable number.

90655637 is a deficient number, since it is larger than the sum of its proper divisors (1).

90655637 is an equidigital number, since it uses as much as digits as its factorization.

90655637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 90655637 is about 9521.3253804289. The cubic root of 90655637 is about 449.2260556829.

The spelling of 90655637 in words is "ninety million, six hundred fifty-five thousand, six hundred thirty-seven".