81337007 has 2 divisors, whose sum is σ = 81337008. Its totient is φ = 81337006.

The previous prime is 81337001. The next prime is 81337019. The reversal of 81337007 is 70073318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81337007 - 2⁶ = 81336943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81337001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40668503 + 40668504.

It is an arithmetic number, because the mean of its divisors is an integer number (40668504).

Almost surely, 2^81337007 is an apocalyptic number.

81337007 is a deficient number, since it is larger than the sum of its proper divisors (1).

81337007 is an equidigital number, since it uses as much as digits as its factorization.

81337007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 81337007 is about 9018.7031772866. The cubic root of 81337007 is about 433.2741003192.

The spelling of 81337007 in words is "eighty-one million, three hundred thirty-seven thousand, seven".