90183409 has 2 divisors, whose sum is σ = 90183410. Its totient is φ = 90183408.

The previous prime is 90183403. The next prime is 90183449. The reversal of 90183409 is 90438109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 4528384 = 9255^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 90183409 - 2⁷ = 90183281 is a prime.

It is a super-2 number, since 2×90183409² = 16266094517722562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90183403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45091704 + 45091705.

It is an arithmetic number, because the mean of its divisors is an integer number (45091705).

Almost surely, 2^90183409 is an apocalyptic number.

It is an amenable number.

90183409 is a deficient number, since it is larger than the sum of its proper divisors (1).

90183409 is an equidigital number, since it uses as much as digits as its factorization.

90183409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 90183409 is about 9496.4945637851. The cubic root of 90183409 is about 448.4446866052. Note that the first 3 decimals are identical.

The spelling of 90183409 in words is "ninety million, one hundred eighty-three thousand, four hundred nine".