11397831 has 8 divisors (see below), whose sum is σ = 15214704. Its totient is φ = 7589760.

The previous prime is 11397823. The next prime is 11397833. The reversal of 11397831 is 13879311.

11397831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11397831 - 2³ = 11397823 is a prime.

It is a super-2 number, since 2×11397831² = 259821103009122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11397792 and 11397801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11397833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1935 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (1901838).

Almost surely, 2^11397831 is an apocalyptic number.

11397831 is a deficient number, since it is larger than the sum of its proper divisors (3816873).

11397831 is a wasteful number, since it uses less digits than its factorization.

11397831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401.

The product of its digits is 4536, while the sum is 33.

The square root of 11397831 is about 3376.0673867682. The cubic root of 11397831 is about 225.0474369117.

The spelling of 11397831 in words is "eleven million, three hundred ninety-seven thousand, eight hundred thirty-one".