2038567981 has 4 divisors (see below), whose sum is σ = 2044409500. Its totient is φ = 2032726464.

The previous prime is 2038567943. The next prime is 2038567987. The reversal of 2038567981 is 1897658302.

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 1033043881 + 1005524100 = 32141^2 + 31710^2 .

It is a cyclic number.

It is not a de Polignac number, because 2038567981 - 2²⁹ = 1501697069 is a prime.

It is a super-2 number, since 2×2038567981² = 8311518826316832722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2038567987) 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 3 ways as a sum of consecutive naturals, for example, 2920236 + ... + 2920933.

It is an arithmetic number, because the mean of its divisors is an integer number (511102375).

Almost surely, 2^2038567981 is an apocalyptic number.

It is an amenable number.

2038567981 is a deficient number, since it is larger than the sum of its proper divisors (5841519).

2038567981 is an equidigital number, since it uses as much as digits as its factorization.

2038567981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5841518.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2038567981 is about 45150.5036627500. The cubic root of 2038567981 is about 1267.9683102089.

The spelling of 2038567981 in words is "two billion, thirty-eight million, five hundred sixty-seven thousand, nine hundred eighty-one".