11899397 has 4 divisors (see below), whose sum is σ = 11906400. Its totient is φ = 11892396.

The previous prime is 11899379. The next prime is 11899399. The reversal of 11899397 is 79399811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79399811 = 1181 ⋅67231.

It is a cyclic number.

It is not a de Polignac number, because 11899397 - 2⁶ = 11899333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11899399) 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, 854 + ... + 4952.

It is an arithmetic number, because the mean of its divisors is an integer number (2976600).

Almost surely, 2^11899397 is an apocalyptic number.

It is an amenable number.

11899397 is a deficient number, since it is larger than the sum of its proper divisors (7003).

11899397 is an equidigital number, since it uses as much as digits as its factorization.

11899397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002.

The product of its digits is 122472, while the sum is 47.

The square root of 11899397 is about 3449.5502605412. The cubic root of 11899397 is about 228.3012650839.

The spelling of 11899397 in words is "eleven million, eight hundred ninety-nine thousand, three hundred ninety-seven".