90990083 has 4 divisors (see below), whose sum is σ = 91057728. Its totient is φ = 90922440.

The previous prime is 90990077. The next prime is 90990091. The reversal of 90990083 is 38009909.

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 90990083 - 2⁶ = 90990019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90990013) 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, 31763 + ... + 34508.

It is an arithmetic number, because the mean of its divisors is an integer number (22764432).

Almost surely, 2^90990083 is an apocalyptic number.

90990083 is a deficient number, since it is larger than the sum of its proper divisors (67645).

90990083 is a wasteful number, since it uses less digits than its factorization.

90990083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67644.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90990083 is about 9538.8722079709. The cubic root of 90990083 is about 449.7778047086. Note that the first 3 decimals are identical.

The spelling of 90990083 in words is "ninety million, nine hundred ninety thousand, eighty-three".