90824861 has 4 divisors (see below), whose sum is σ = 94773792. Its totient is φ = 86875932.

The previous prime is 90824857. The next prime is 90824873. The reversal of 90824861 is 16842809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90824861 - 2² = 90824857 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 (90824801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974431 + ... + 1974476.

It is an arithmetic number, because the mean of its divisors is an integer number (23693448).

Almost surely, 2^90824861 is an apocalyptic number.

It is an amenable number.

90824861 is a deficient number, since it is larger than the sum of its proper divisors (3948931).

90824861 is a wasteful number, since it uses less digits than its factorization.

90824861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948930.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 90824861 is about 9530.2078151528. The cubic root of 90824861 is about 449.5054006131.

The spelling of 90824861 in words is "ninety million, eight hundred twenty-four thousand, eight hundred sixty-one".