104781431 has 2 divisors, whose sum is σ = 104781432. Its totient is φ = 104781430.

The previous prime is 104781407. The next prime is 104781451. The reversal of 104781431 is 134187401.

It is a strong prime.

It is an emirp because it is prime and its reverse (134187401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104781431 - 2¹⁸ = 104519287 is a prime.

It is a super-2 number, since 2×104781431² = 21958296564815522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_6020849 and since 104781431 and 6020849 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 104781394 and 104781403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104781451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52390715 + 52390716.

It is an arithmetic number, because the mean of its divisors is an integer number (52390716).

Almost surely, 2^104781431 is an apocalyptic number.

104781431 is a deficient number, since it is larger than the sum of its proper divisors (1).

104781431 is an equidigital number, since it uses as much as digits as its factorization.

104781431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 104781431 is about 10236.2801348928. The cubic root of 104781431 is about 471.4418240754.

The spelling of 104781431 in words is "one hundred four million, seven hundred eighty-one thousand, four hundred thirty-one".