16453971 has 12 divisors (see below), whose sum is σ = 23814648. Its totient is φ = 10947264.

The previous prime is 16453967. The next prime is 16453973. The reversal of 16453971 is 17935461.

16453971 is a `hidden beast` number, since 1 + 645 + 3 + 9 + 7 + 1 = 666.

It is not a de Polignac number, because 16453971 - 2² = 16453967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16453973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3796 + ... + 6878.

It is an arithmetic number, because the mean of its divisors is an integer number (1984554).

Almost surely, 2^16453971 is an apocalyptic number.

16453971 is a deficient number, since it is larger than the sum of its proper divisors (7360677).

16453971 is a wasteful number, since it uses less digits than its factorization.

16453971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682 (or 3679 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 16453971 is about 4056.3494671934. The cubic root of 16453971 is about 254.3452174522.

It can be divided in two parts, 16453 and 971, that added together give a square (17424 = 132²).

The spelling of 16453971 in words is "sixteen million, four hundred fifty-three thousand, nine hundred seventy-one".