90541819 has 2 divisors, whose sum is σ = 90541820. Its totient is φ = 90541818.

The previous prime is 90541807. The next prime is 90541877. The reversal of 90541819 is 91814509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90541819 - 2⁷ = 90541691 is a prime.

It is a super-2 number, since 2×90541819² = 16395641975657522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90541879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45270909 + 45270910.

It is an arithmetic number, because the mean of its divisors is an integer number (45270910).

Almost surely, 2^90541819 is an apocalyptic number.

90541819 is a deficient number, since it is larger than the sum of its proper divisors (1).

90541819 is an equidigital number, since it uses as much as digits as its factorization.

90541819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 90541819 is about 9515.3464992085. The cubic root of 90541819 is about 449.0379760969.

It can be divided in two parts, 905 and 41819, that added together give a palindrome (42724).

The spelling of 90541819 in words is "ninety million, five hundred forty-one thousand, eight hundred nineteen".