6861431 has 2 divisors, whose sum is σ = 6861432. Its totient is φ = 6861430.

The previous prime is 6861427. The next prime is 6861461. The reversal of 6861431 is 1341686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6861431 - 2² = 6861427 is a prime.

It is a super-2 number, since 2×6861431² = 94158470735522, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 6861394 and 6861403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6861401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430715 + 3430716.

It is an arithmetic number, because the mean of its divisors is an integer number (3430716).

Almost surely, 2^6861431 is an apocalyptic number.

6861431 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861431 is an equidigital number, since it uses as much as digits as its factorization.

6861431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 6861431 is about 2619.4333356663. The cubic root of 6861431 is about 190.0224442553.

The spelling of 6861431 in words is "six million, eight hundred sixty-one thousand, four hundred thirty-one".