81432467 has 2 divisors, whose sum is σ = 81432468. Its totient is φ = 81432466.

The previous prime is 81432451. The next prime is 81432473. The reversal of 81432467 is 76423418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81432467 - 2⁴ = 81432451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81432367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40716233 + 40716234.

It is an arithmetic number, because the mean of its divisors is an integer number (40716234).

Almost surely, 2^81432467 is an apocalyptic number.

81432467 is a deficient number, since it is larger than the sum of its proper divisors (1).

81432467 is an equidigital number, since it uses as much as digits as its factorization.

81432467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 81432467 is about 9023.9939605476. The cubic root of 81432467 is about 433.4435360084.

The spelling of 81432467 in words is "eighty-one million, four hundred thirty-two thousand, four hundred sixty-seven".