163881037 has 4 divisors (see below), whose sum is σ = 173521116. Its totient is φ = 154240960.

The previous prime is 163881013. The next prime is 163881043. The reversal of 163881037 is 730188361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135001161 + 28879876 = 11619^2 + 5374^2 .

It is a cyclic number.

It is not a de Polignac number, because 163881037 - 2¹⁹ = 163356749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163880987 and 163881005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163881007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4820014 + ... + 4820047.

It is an arithmetic number, because the mean of its divisors is an integer number (43380279).

Almost surely, 2^163881037 is an apocalyptic number.

163881037 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

163881037 is a deficient number, since it is larger than the sum of its proper divisors (9640079).

163881037 is an equidigital number, since it uses as much as digits as its factorization.

163881037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9640078.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 163881037 is about 12801.6029074487. The cubic root of 163881037 is about 547.2379842029.

The spelling of 163881037 in words is "one hundred sixty-three million, eight hundred eighty-one thousand, thirty-seven".