81412937 has 2 divisors, whose sum is σ = 81412938. Its totient is φ = 81412936.

The previous prime is 81412927. The next prime is 81412993. The reversal of 81412937 is 73921418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 25999801 = 7444^2 + 5099^2 .

It is a cyclic number.

It is not a de Polignac number, because 81412937 - 2¹⁸ = 81150793 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81412897 and 81412906.

It is not a weakly prime, because it can be changed into another prime (81412907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40706468 + 40706469.

It is an arithmetic number, because the mean of its divisors is an integer number (40706469).

Almost surely, 2^81412937 is an apocalyptic number.

It is an amenable number.

81412937 is a deficient number, since it is larger than the sum of its proper divisors (1).

81412937 is an equidigital number, since it uses as much as digits as its factorization.

81412937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 81412937 is about 9022.9117805728. The cubic root of 81412937 is about 433.4088822255.

The spelling of 81412937 in words is "eighty-one million, four hundred twelve thousand, nine hundred thirty-seven".