81600937 has 8 divisors (see below), whose sum is σ = 89153280. Its totient is φ = 74070960.

The previous prime is 81600931. The next prime is 81600943. The reversal of 81600937 is 73900618.

It is an interprime number because it is at equal distance from previous prime (81600931) and next prime (81600943).

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 81600937 - 2²³ = 73212329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81600931) 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, 2568 + ... + 13030.

It is an arithmetic number, because the mean of its divisors is an integer number (11144160).

Almost surely, 2^81600937 is an apocalyptic number.

It is an amenable number.

81600937 is a deficient number, since it is larger than the sum of its proper divisors (7552343).

81600937 is a wasteful number, since it uses less digits than its factorization.

81600937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11183.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 81600937 is about 9033.3236961818. The cubic root of 81600937 is about 433.7422372354.

The spelling of 81600937 in words is "eighty-one million, six hundred thousand, nine hundred thirty-seven".