90438311 has 4 divisors (see below), whose sum is σ = 90466992. Its totient is φ = 90409632.

The previous prime is 90438133. The next prime is 90438343. The reversal of 90438311 is 11383409.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90438311 - 2²² = 86244007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90438911) 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 in 3 ways as a sum of consecutive naturals, for example, 8930 + ... + 16143.

It is an arithmetic number, because the mean of its divisors is an integer number (22616748).

Almost surely, 2^90438311 is an apocalyptic number.

90438311 is a deficient number, since it is larger than the sum of its proper divisors (28681).

90438311 is a wasteful number, since it uses less digits than its factorization.

90438311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28680.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 90438311 is about 9509.9059406495. The cubic root of 90438311 is about 448.8667964648.

The spelling of 90438311 in words is "ninety million, four hundred thirty-eight thousand, three hundred eleven".