11372820397 has 4 divisors (see below), whose sum is σ = 11395983456. Its totient is φ = 11349657340.

The previous prime is 11372820391. The next prime is 11372820421. The reversal of 11372820397 is 79302827311.

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 an emirpimes, since its reverse is a distinct semiprime: 79302827311 = 331 ⋅239585581.

It is a cyclic number.

It is not a de Polignac number, because 11372820397 - 2⁷ = 11372820269 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 (11372820391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11580793 + ... + 11581774.

It is an arithmetic number, because the mean of its divisors is an integer number (2848995864).

Almost surely, 2^11372820397 is an apocalyptic number.

It is an amenable number.

11372820397 is a deficient number, since it is larger than the sum of its proper divisors (23163059).

11372820397 is an equidigital number, since it uses as much as digits as its factorization.

11372820397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23163058.

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 11372820397 in words is "eleven billion, three hundred seventy-two million, eight hundred twenty thousand, three hundred ninety-seven".