81030437 has 8 divisors (see below), whose sum is σ = 83967840. Its totient is φ = 78102640.

The previous prime is 81030419. The next prime is 81030457. The reversal of 81030437 is 73403018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81030437 - 2²⁴ = 64253221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81030457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17762 + ... + 21852.

It is an arithmetic number, because the mean of its divisors is an integer number (10495980).

Almost surely, 2^81030437 is an apocalyptic number.

It is an amenable number.

81030437 is a deficient number, since it is larger than the sum of its proper divisors (2937403).

81030437 is a wasteful number, since it uses less digits than its factorization.

81030437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 81030437 is about 9001.6907856247. The cubic root of 81030437 is about 432.7290590588.

The spelling of 81030437 in words is "eighty-one million, thirty thousand, four hundred thirty-seven".