9961427 has 4 divisors (see below), whose sum is σ = 11384496. Its totient is φ = 8538360.

The previous prime is 9961421. The next prime is 9961429. The reversal of 9961427 is 7241699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9961427 - 2¹² = 9957331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9961421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711524 + ... + 711537.

It is an arithmetic number, because the mean of its divisors is an integer number (2846124).

Almost surely, 2^9961427 is an apocalyptic number.

9961427 is a deficient number, since it is larger than the sum of its proper divisors (1423069).

9961427 is a wasteful number, since it uses less digits than its factorization.

9961427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423068.

The product of its digits is 27216, while the sum is 38.

The square root of 9961427 is about 3156.1728406410. The cubic root of 9961427 is about 215.1661020367.

The spelling of 9961427 in words is "nine million, nine hundred sixty-one thousand, four hundred twenty-seven".