9722149 has 4 divisors (see below), whose sum is σ = 9745036. Its totient is φ = 9699264.

The previous prime is 9722137. The next prime is 9722177. The reversal of 9722149 is 9412279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9412279 = 1601 ⋅5879.

It can be written as a sum of positive squares in 2 ways, for example, as 1060900 + 8661249 = 1030^2 + 2943^2 .

It is a cyclic number.

It is not a de Polignac number, because 9722149 - 2⁵ = 9722117 is a prime.

It is a Duffinian number.

9722149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9722179) 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, 10794 + ... + 11659.

It is an arithmetic number, because the mean of its divisors is an integer number (2436259).

Almost surely, 2^9722149 is an apocalyptic number.

It is an amenable number.

9722149 is a deficient number, since it is larger than the sum of its proper divisors (22887).

9722149 is a wasteful number, since it uses less digits than its factorization.

9722149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22886.

The product of its digits is 9072, while the sum is 34.

The square root of 9722149 is about 3118.0360806123. The cubic root of 9722149 is about 213.4293250193.

The spelling of 9722149 in words is "nine million, seven hundred twenty-two thousand, one hundred forty-nine".