13845431 has 2 divisors, whose sum is σ = 13845432. Its totient is φ = 13845430.

The previous prime is 13845421. The next prime is 13845439. The reversal of 13845431 is 13454831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13845431 - 2⁶ = 13845367 is a prime.

It is a super-2 number, since 2×13845431² = 383391919151522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 13845394 and 13845403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13845439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6922715 + 6922716.

It is an arithmetic number, because the mean of its divisors is an integer number (6922716).

Almost surely, 2^13845431 is an apocalyptic number.

13845431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13845431 is an equidigital number, since it uses as much as digits as its factorization.

13845431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 13845431 is about 3720.9449068751. The cubic root of 13845431 is about 240.1239579565.

The spelling of 13845431 in words is "thirteen million, eight hundred forty-five thousand, four hundred thirty-one".