11900197 has 4 divisors (see below), whose sum is σ = 11943436. Its totient is φ = 11856960.

The previous prime is 11900173. The next prime is 11900201. The reversal of 11900197 is 79100911.

11900197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1653796 + 10246401 = 1286^2 + 3201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11900197 is a prime.

It is a super-2 number, since 2×11900197² = 283229377277618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11900107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21204 + ... + 21757.

It is an arithmetic number, because the mean of its divisors is an integer number (2985859).

Almost surely, 2^11900197 is an apocalyptic number.

It is an amenable number.

11900197 is a deficient number, since it is larger than the sum of its proper divisors (43239).

11900197 is an equidigital number, since it uses as much as digits as its factorization.

11900197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43238.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 11900197 is about 3449.6662157374. Note that the first 3 decimals coincide. The cubic root of 11900197 is about 228.3063812233.

The spelling of 11900197 in words is "eleven million, nine hundred thousand, one hundred ninety-seven".