90473081 has 2 divisors, whose sum is σ = 90473082. Its totient is φ = 90473080.

The previous prime is 90473077. The next prime is 90473093. The reversal of 90473081 is 18037409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79477225 + 10995856 = 8915^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 90473081 - 2² = 90473077 is a prime.

It is a super-2 number, since 2×90473081² = 16370756771265122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90473281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45236540 + 45236541.

It is an arithmetic number, because the mean of its divisors is an integer number (45236541).

Almost surely, 2^90473081 is an apocalyptic number.

It is an amenable number.

90473081 is a deficient number, since it is larger than the sum of its proper divisors (1).

90473081 is an equidigital number, since it uses as much as digits as its factorization.

90473081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 90473081 is about 9511.7338587662. The cubic root of 90473081 is about 448.9243130145.

The spelling of 90473081 in words is "ninety million, four hundred seventy-three thousand, eighty-one".