90738481 has 2 divisors, whose sum is σ = 90738482. Its totient is φ = 90738480.

The previous prime is 90738463. The next prime is 90738517. The reversal of 90738481 is 18483709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 43678881 = 6860^2 + 6609^2 .

It is a cyclic number.

It is not a de Polignac number, because 90738481 - 2⁵ = 90738449 is a prime.

It is a super-2 number, since 2×90738481² = 16466943868374722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90738421) 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, 45369240 + 45369241.

It is an arithmetic number, because the mean of its divisors is an integer number (45369241).

Almost surely, 2^90738481 is an apocalyptic number.

It is an amenable number.

90738481 is a deficient number, since it is larger than the sum of its proper divisors (1).

90738481 is an equidigital number, since it uses as much as digits as its factorization.

90738481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 90738481 is about 9525.6748317376. The cubic root of 90738481 is about 449.3628530333.

It can be divided in two parts, 90738 and 481, that added together give a palindrome (91219).

The spelling of 90738481 in words is "ninety million, seven hundred thirty-eight thousand, four hundred eighty-one".