9622991 has 4 divisors (see below), whose sum is σ = 10997712. Its totient is φ = 8248272.

The previous prime is 9622979. The next prime is 9623021. The reversal of 9622991 is 1992269.

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 9622991 - 2¹⁴ = 9606607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9622931) 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, 687350 + ... + 687363.

It is an arithmetic number, because the mean of its divisors is an integer number (2749428).

Almost surely, 2^9622991 is an apocalyptic number.

9622991 is a deficient number, since it is larger than the sum of its proper divisors (1374721).

9622991 is a wasteful number, since it uses less digits than its factorization.

9622991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374720.

The product of its digits is 17496, while the sum is 38.

The square root of 9622991 is about 3102.0946149336. The cubic root of 9622991 is about 212.7012423461.

The spelling of 9622991 in words is "nine million, six hundred twenty-two thousand, nine hundred ninety-one".