9927561 has 8 divisors (see below), whose sum is σ = 15127744. Its totient is φ = 5672880.

The previous prime is 9927553. The next prime is 9927563. The reversal of 9927561 is 1657299.

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

It is not a de Polignac number, because 9927561 - 2³ = 9927553 is a prime.

It is a Duffinian number.

It is a Curzon number.

9927561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9927563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236350 + ... + 236391.

It is an arithmetic number, because the mean of its divisors is an integer number (1890968).

Almost surely, 2^9927561 is an apocalyptic number.

It is an amenable number.

9927561 is a deficient number, since it is larger than the sum of its proper divisors (5200183).

9927561 is a wasteful number, since it uses less digits than its factorization.

9927561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472751.

The product of its digits is 34020, while the sum is 39.

The square root of 9927561 is about 3150.8032309238. The cubic root of 9927561 is about 214.9219908085.

The spelling of 9927561 in words is "nine million, nine hundred twenty-seven thousand, five hundred sixty-one".