11997970 has 16 divisors (see below), whose sum is σ = 21643200. Its totient is φ = 4788784.

The previous prime is 11997959. The next prime is 11997977. The reversal of 11997970 is 7979911.

It is not an unprimeable number, because it can be changed into a prime (11997977) 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, 4989 + ... + 6991.

It is an arithmetic number, because the mean of its divisors is an integer number (1352700).

Almost surely, 2^11997970 is an apocalyptic number.

11997970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11997970 is a deficient number, since it is larger than the sum of its proper divisors (9645230).

11997970 is a wasteful number, since it uses less digits than its factorization.

11997970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2609.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 11997970 is about 3463.8085974834. The cubic root of 11997970 is about 228.9299379498.

It can be divided in two parts, 119 and 97970, that added together give a palindrome (98089).

The spelling of 11997970 in words is "eleven million, nine hundred ninety-seven thousand, nine hundred seventy".