81364007 has 2 divisors, whose sum is σ = 81364008. Its totient is φ = 81364006.

The previous prime is 81364001. The next prime is 81364033. The reversal of 81364007 is 70046318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81364007 - 2⁴ = 81363991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81364001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40682003 + 40682004.

It is an arithmetic number, because the mean of its divisors is an integer number (40682004).

Almost surely, 2^81364007 is an apocalyptic number.

81364007 is a deficient number, since it is larger than the sum of its proper divisors (1).

81364007 is an equidigital number, since it uses as much as digits as its factorization.

81364007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 81364007 is about 9020.1999423516. The cubic root of 81364007 is about 433.3220371151.

The spelling of 81364007 in words is "eighty-one million, three hundred sixty-four thousand, seven".