11854697431 has 4 divisors (see below), whose sum is σ = 12552032592. Its totient is φ = 11157362272.

The previous prime is 11854697423. The next prime is 11854697443. The reversal of 11854697431 is 13479645811.

11854697431 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, and also an emirpimes, since its reverse is a distinct semiprime: 13479645811 = 23 ⋅586071557.

It is a cyclic number.

It is not a de Polignac number, because 11854697431 - 2³ = 11854697423 is a prime.

It is a super-2 number, since 2×11854697431² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11854697131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348667555 + ... + 348667588.

It is an arithmetic number, because the mean of its divisors is an integer number (3138008148).

Almost surely, 2^11854697431 is an apocalyptic number.

11854697431 is a deficient number, since it is larger than the sum of its proper divisors (697335161).

11854697431 is an equidigital number, since it uses as much as digits as its factorization.

11854697431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697335160.

The product of its digits is 725760, while the sum is 49.

The spelling of 11854697431 in words is "eleven billion, eight hundred fifty-four million, six hundred ninety-seven thousand, four hundred thirty-one".