9951972 has 24 divisors (see below), whose sum is σ = 24444000. Its totient is φ = 3142656.

The previous prime is 9951917. The next prime is 9951973. The reversal of 9951972 is 2791599.

It is not an unprimeable number, because it can be changed into a prime (9951973) 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, 21597 + ... + 22052.

It is an arithmetic number, because the mean of its divisors is an integer number (1018500).

Almost surely, 2^9951972 is an apocalyptic number.

It is an amenable number.

9951972 is an abundant number, since it is smaller than the sum of its proper divisors (14492028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9951972 is a wasteful number, since it uses less digits than its factorization.

9951972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43675 (or 43673 counting only the distinct ones).

The product of its digits is 51030, while the sum is 42.

The square root of 9951972 is about 3154.6746266454. The cubic root of 9951972 is about 215.0980047152.

The spelling of 9951972 in words is "nine million, nine hundred fifty-one thousand, nine hundred seventy-two".