900561601 has 8 divisors (see below), whose sum is σ = 949267520. Its totient is φ = 851986512.

The previous prime is 900561593. The next prime is 900561617. The reversal of 900561601 is 106165009.

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

It is a cyclic number.

It is not a de Polignac number, because 900561601 - 2³ = 900561593 is a prime.

It is a super-2 number, since 2×900561601² = 1622022394391366402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 900561601.

It is not an unprimeable number, because it can be changed into a prime (900561671) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18405 + ... + 46258.

It is an arithmetic number, because the mean of its divisors is an integer number (118658440).

Almost surely, 2^900561601 is an apocalyptic number.

It is an amenable number.

900561601 is a deficient number, since it is larger than the sum of its proper divisors (48705919).

900561601 is a wasteful number, since it uses less digits than its factorization.

900561601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65415.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 900561601 is about 30009.3585569569. The cubic root of 900561601 is about 965.6901649986.

The spelling of 900561601 in words is "nine hundred million, five hundred sixty-one thousand, six hundred one".