90933823 has 2 divisors, whose sum is σ = 90933824. Its totient is φ = 90933822.

The previous prime is 90933797. The next prime is 90933847. The reversal of 90933823 is 32833909.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90933823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90933883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45466911 + 45466912.

It is an arithmetic number, because the mean of its divisors is an integer number (45466912).

Almost surely, 2^90933823 is an apocalyptic number.

90933823 is a deficient number, since it is larger than the sum of its proper divisors (1).

90933823 is an equidigital number, since it uses as much as digits as its factorization.

90933823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 90933823 is about 9535.9227660463. The cubic root of 90933823 is about 449.6850850202.

The spelling of 90933823 in words is "ninety million, nine hundred thirty-three thousand, eight hundred twenty-three".