9721954 has 8 divisors (see below), whose sum is σ = 15908688. Its totient is φ = 4419060.

The previous prime is 9721951. The next prime is 9721969. The reversal of 9721954 is 4591279.

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

It is not an unprimeable number, because it can be changed into a prime (9721951) 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, 220932 + ... + 220975.

It is an arithmetic number, because the mean of its divisors is an integer number (1988586).

Almost surely, 2^9721954 is an apocalyptic number.

9721954 is a deficient number, since it is larger than the sum of its proper divisors (6186734).

9721954 is a wasteful number, since it uses less digits than its factorization.

9721954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441920.

The product of its digits is 22680, while the sum is 37.

The square root of 9721954 is about 3118.0048107724. The cubic root of 9721954 is about 213.4278980715.

It can be divided in two parts, 972 and 1954, that added together give a triangular number (2926 = T₇₆).

The spelling of 9721954 in words is "nine million, seven hundred twenty-one thousand, nine hundred fifty-four".