11997453 has 8 divisors (see below), whose sum is σ = 17227168. Its totient is φ = 7383024.

The previous prime is 11997449. The next prime is 11997463. The reversal of 11997453 is 35479911.

It is a happy number.

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

It is not a de Polignac number, because 11997453 - 2² = 11997449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 307627 = 11997453 / (1 + 1 + 9 + 9 + 7 + 4 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11997443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153775 + ... + 153852.

It is an arithmetic number, because the mean of its divisors is an integer number (2153396).

Almost surely, 2^11997453 is an apocalyptic number.

11997453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11997453 is a deficient number, since it is larger than the sum of its proper divisors (5229715).

11997453 is a wasteful number, since it uses less digits than its factorization.

11997453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307643.

The product of its digits is 34020, while the sum is 39.

The square root of 11997453 is about 3463.7339678445. The cubic root of 11997453 is about 228.9266496580.

The spelling of 11997453 in words is "eleven million, nine hundred ninety-seven thousand, four hundred fifty-three".