981381279 has 16 divisors (see below), whose sum is σ = 1340432640. Its totient is φ = 638454720.

The previous prime is 981381263. The next prime is 981381311. The reversal of 981381279 is 972183189.

It is not a de Polignac number, because 981381279 - 2⁴ = 981381263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981381239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4014 + ... + 44484.

It is an arithmetic number, because the mean of its divisors is an integer number (83777040).

Almost surely, 2^981381279 is an apocalyptic number.

981381279 is a deficient number, since it is larger than the sum of its proper divisors (359051361).

981381279 is a wasteful number, since it uses less digits than its factorization.

981381279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40670.

The product of its digits is 217728, while the sum is 48.

The square root of 981381279 is about 31327.0055862350. The cubic root of 981381279 is about 993.7548388198.

The spelling of 981381279 in words is "nine hundred eighty-one million, three hundred eighty-one thousand, two hundred seventy-nine".