81262807 has 2 divisors, whose sum is σ = 81262808. Its totient is φ = 81262806.

The previous prime is 81262799. The next prime is 81262847. The reversal of 81262807 is 70826218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81262807 - 2³ = 81262799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81262847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40631403 + 40631404.

It is an arithmetic number, because the mean of its divisors is an integer number (40631404).

Almost surely, 2^81262807 is an apocalyptic number.

81262807 is a deficient number, since it is larger than the sum of its proper divisors (1).

81262807 is an equidigital number, since it uses as much as digits as its factorization.

81262807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81262807 is about 9014.5885652092. The cubic root of 81262807 is about 433.1423082425.

The spelling of 81262807 in words is "eighty-one million, two hundred sixty-two thousand, eight hundred seven".