90836401 has 2 divisors, whose sum is σ = 90836402. Its totient is φ = 90836400.

The previous prime is 90836399. The next prime is 90836411. The reversal of 90836401 is 10463809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78304801 + 12531600 = 8849^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 90836401 - 2¹ = 90836399 is a prime.

Together with 90836399, it forms a pair of twin primes.

It is equal to p_5262745 and since 90836401 and 5262745 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90836411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45418200 + 45418201.

It is an arithmetic number, because the mean of its divisors is an integer number (45418201).

Almost surely, 2^90836401 is an apocalyptic number.

It is an amenable number.

90836401 is a deficient number, since it is larger than the sum of its proper divisors (1).

90836401 is an equidigital number, since it uses as much as digits as its factorization.

90836401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 90836401 is about 9530.8132391732. The cubic root of 90836401 is about 449.5244375177.

The spelling of 90836401 in words is "ninety million, eight hundred thirty-six thousand, four hundred one".