90930890 has 8 divisors (see below), whose sum is σ = 163675620. Its totient is φ = 36372352.

The previous prime is 90930887. The next prime is 90930901. The reversal of 90930890 is 9803909.

It can be written as a sum of positive squares in 2 ways, for example, as 90193009 + 737881 = 9497^2 + 859^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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, 4546535 + ... + 4546554.

Almost surely, 2^90930890 is an apocalyptic number.

90930890 is a deficient number, since it is larger than the sum of its proper divisors (72744730).

90930890 is a wasteful number, since it uses less digits than its factorization.

90930890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093096.

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

The square root of 90930890 is about 9535.7689779063. The cubic root of 90930890 is about 449.6802502202.

The spelling of 90930890 in words is "ninety million, nine hundred thirty thousand, eight hundred ninety".