90450413 has 2 divisors, whose sum is σ = 90450414. Its totient is φ = 90450412.

The previous prime is 90450407. The next prime is 90450461. The reversal of 90450413 is 31405409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90288004 + 162409 = 9502^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 90450413 - 2¹⁰ = 90449389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90450403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45225206 + 45225207.

It is an arithmetic number, because the mean of its divisors is an integer number (45225207).

Almost surely, 2^90450413 is an apocalyptic number.

It is an amenable number.

90450413 is a deficient number, since it is larger than the sum of its proper divisors (1).

90450413 is an equidigital number, since it uses as much as digits as its factorization.

90450413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 90450413 is about 9510.5422032605. The cubic root of 90450413 is about 448.8868172710.

The spelling of 90450413 in words is "ninety million, four hundred fifty thousand, four hundred thirteen".