90521606 has 32 divisors (see below), whose sum is σ = 164187648. Its totient is φ = 36590400.

The previous prime is 90521603. The next prime is 90521609. The reversal of 90521606 is 60612509.

90521606 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (90521603) and next prime (90521609).

It is a super-2 number, since 2×90521606² = 16388322305638472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90521603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21581 + ... + 25431.

It is an arithmetic number, because the mean of its divisors is an integer number (5130864).

Almost surely, 2^90521606 is an apocalyptic number.

90521606 is a deficient number, since it is larger than the sum of its proper divisors (73666042).

90521606 is a wasteful number, since it uses less digits than its factorization.

90521606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 90521606 is about 9514.2843135992. The cubic root of 90521606 is about 449.0045584629.

The spelling of 90521606 in words is "ninety million, five hundred twenty-one thousand, six hundred six".