981411381 has 6 divisors (see below), whose sum is σ = 1417594230. Its totient is φ = 654274248.

The previous prime is 981411293. The next prime is 981411397. The reversal of 981411381 is 183114189.

It can be written as a sum of positive squares in only one way, i.e., 653620356 + 327791025 = 25566^2 + 18105^2 .

It is not a de Polignac number, because 981411381 - 2⁷ = 981411253 is a prime.

It is a super-2 number, since 2×981411381² = 1926336597512654322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981411481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54522846 + ... + 54522863.

It is an arithmetic number, because the mean of its divisors is an integer number (236265705).

Almost surely, 2^981411381 is an apocalyptic number.

It is an amenable number.

981411381 is a deficient number, since it is larger than the sum of its proper divisors (436182849).

981411381 is a wasteful number, since it uses less digits than its factorization.

981411381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109045715 (or 109045712 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 981411381 is about 31327.4860306409. The cubic root of 981411381 is about 993.7649992277.

The spelling of 981411381 in words is "nine hundred eighty-one million, four hundred eleven thousand, three hundred eighty-one".