81250067 has 2 divisors, whose sum is σ = 81250068. Its totient is φ = 81250066.

The previous prime is 81250049. The next prime is 81250073. The reversal of 81250067 is 76005218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81250067 - 2⁸ = 81249811 is a prime.

It is not a weakly prime, because it can be changed into another prime (81250027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40625033 + 40625034.

It is an arithmetic number, because the mean of its divisors is an integer number (40625034).

Almost surely, 2^81250067 is an apocalyptic number.

81250067 is a deficient number, since it is larger than the sum of its proper divisors (1).

81250067 is an equidigital number, since it uses as much as digits as its factorization.

81250067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 81250067 is about 9013.8819051505. The cubic root of 81250067 is about 433.1196717228.

The spelling of 81250067 in words is "eighty-one million, two hundred fifty thousand, sixty-seven".