90099946 has 4 divisors (see below), whose sum is σ = 135149922. Its totient is φ = 45049972.

The previous prime is 90099943. The next prime is 90099953. The reversal of 90099946 is 64999009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64999009 = 71 ⋅915479.

It can be written as a sum of positive squares in only one way, i.e., 80730225 + 9369721 = 8985^2 + 3061^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90099896 and 90099905.

It is not an unprimeable number, because it can be changed into a prime (90099941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22524985 + ... + 22524988.

Almost surely, 2^90099946 is an apocalyptic number.

90099946 is a deficient number, since it is larger than the sum of its proper divisors (45049976).

90099946 is a wasteful number, since it uses less digits than its factorization.

90099946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45049975.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 90099946 is about 9492.0991355969. The cubic root of 90099946 is about 448.3063016121.

The spelling of 90099946 in words is "ninety million, ninety-nine thousand, nine hundred forty-six".