81034237 has 2 divisors, whose sum is σ = 81034238. Its totient is φ = 81034236.

The previous prime is 81034229. The next prime is 81034241. The reversal of 81034237 is 73243018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 35593156 = 6741^2 + 5966^2 .

It is a cyclic number.

It is not a de Polignac number, because 81034237 - 2³ = 81034229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81034337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40517118 + 40517119.

It is an arithmetic number, because the mean of its divisors is an integer number (40517119).

Almost surely, 2^81034237 is an apocalyptic number.

It is an amenable number.

81034237 is a deficient number, since it is larger than the sum of its proper divisors (1).

81034237 is an equidigital number, since it uses as much as digits as its factorization.

81034237 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 28.

The square root of 81034237 is about 9001.9018546083. The cubic root of 81034237 is about 432.7358233677.

The spelling of 81034237 in words is "eighty-one million, thirty-four thousand, two hundred thirty-seven".