9191972 has 12 divisors (see below), whose sum is σ = 16932720. Its totient is φ = 4354056.

The previous prime is 9191971. The next prime is 9191977. The reversal of 9191972 is 2791919.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (9191971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60398 + ... + 60549.

It is an arithmetic number, because the mean of its divisors is an integer number (1411060).

Almost surely, 2^9191972 is an apocalyptic number.

It is an amenable number.

9191972 is a deficient number, since it is larger than the sum of its proper divisors (7740748).

9191972 is a wasteful number, since it uses less digits than its factorization.

9191972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120970 (or 120968 counting only the distinct ones).

The product of its digits is 10206, while the sum is 38.

The square root of 9191972 is about 3031.8265121870. The cubic root of 9191972 is about 209.4769446968.

The spelling of 9191972 in words is "nine million, one hundred ninety-one thousand, nine hundred seventy-two".