90408611 has 4 divisors (see below), whose sum is σ = 90542832. Its totient is φ = 90274392.

The previous prime is 90408599. The next prime is 90408641. The reversal of 90408611 is 11680409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11680409 = 13 ⋅898493.

It is a cyclic number.

It is not a de Polignac number, because 90408611 - 2⁶ = 90408547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90408641) 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 in 3 ways as a sum of consecutive naturals, for example, 66095 + ... + 67448.

It is an arithmetic number, because the mean of its divisors is an integer number (22635708).

Almost surely, 2^90408611 is an apocalyptic number.

90408611 is a deficient number, since it is larger than the sum of its proper divisors (134221).

90408611 is a wasteful number, since it uses less digits than its factorization.

90408611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134220.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 90408611 is about 9508.3442827866. The cubic root of 90408611 is about 448.8176550360.

It can be divided in two parts, 90408 and 611, that added together give a palindrome (91019).

The spelling of 90408611 in words is "ninety million, four hundred eight thousand, six hundred eleven".