11819406997 has 4 divisors (see below), whose sum is σ = 11823118816. Its totient is φ = 11815695180.

The previous prime is 11819406967. The next prime is 11819407027. The reversal of 11819406997 is 79960491811.

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.

It is an interprime number because it is at equal distance from previous prime (11819406967) and next prime (11819407027).

It is a cyclic number.

It is not a de Polignac number, because 11819406997 - 2²³ = 11811018389 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 (11819406917) 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, 1851129 + ... + 1857502.

It is an arithmetic number, because the mean of its divisors is an integer number (2955779704).

Almost surely, 2^11819406997 is an apocalyptic number.

It is an amenable number.

11819406997 is a deficient number, since it is larger than the sum of its proper divisors (3711819).

11819406997 is an equidigital number, since it uses as much as digits as its factorization.

11819406997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711818.

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 11819406997 in words is "eleven billion, eight hundred nineteen million, four hundred six thousand, nine hundred ninety-seven".