81882037 has 4 divisors (see below), whose sum is σ = 83624256. Its totient is φ = 80139820.

The previous prime is 81882011. The next prime is 81882041. The reversal of 81882037 is 73028818.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81882037 - 2¹¹ = 81879989 is a prime.

It is a super-3 number, since 3×81882037³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81881987 and 81882005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81882007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871039 + ... + 871132.

It is an arithmetic number, because the mean of its divisors is an integer number (20906064).

Almost surely, 2^81882037 is an apocalyptic number.

It is an amenable number.

81882037 is a deficient number, since it is larger than the sum of its proper divisors (1742219).

81882037 is a wasteful number, since it uses less digits than its factorization.

81882037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742218.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 81882037 is about 9048.8693768890. The cubic root of 81882037 is about 434.2397201148.

The spelling of 81882037 in words is "eighty-one million, eight hundred eighty-two thousand, thirty-seven".