81054937 has 2 divisors, whose sum is σ = 81054938. Its totient is φ = 81054936.

The previous prime is 81054899. The next prime is 81054977. The reversal of 81054937 is 73945018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79049881 + 2005056 = 8891^2 + 1416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81054937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81054896 and 81054905.

It is not a weakly prime, because it can be changed into another prime (81054977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40527468 + 40527469.

It is an arithmetic number, because the mean of its divisors is an integer number (40527469).

Almost surely, 2^81054937 is an apocalyptic number.

It is an amenable number.

81054937 is a deficient number, since it is larger than the sum of its proper divisors (1).

81054937 is an equidigital number, since it uses as much as digits as its factorization.

81054937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 81054937 is about 9003.0515382286. The cubic root of 81054937 is about 432.7726673374.

The spelling of 81054937 in words is "eighty-one million, fifty-four thousand, nine hundred thirty-seven".