981481599 has 48 divisors (see below), whose sum is σ = 1708342272. Its totient is φ = 530855424.

The previous prime is 981481561. The next prime is 981481601. The reversal of 981481599 is 995184189.

981481599 is a `hidden beast` number, since 9 + 8 + 1 + 48 + 1 + 599 = 666.

981481599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 981481599 - 2¹³ = 981473407 is a prime.

It is a super-2 number, since 2×981481599² = 1926612258351193602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981481559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137062 + ... + 144044.

It is an arithmetic number, because the mean of its divisors is an integer number (35590464).

Almost surely, 2^981481599 is an apocalyptic number.

981481599 is a deficient number, since it is larger than the sum of its proper divisors (726860673).

981481599 is a wasteful number, since it uses less digits than its factorization.

981481599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116 (or 7113 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 981481599 is about 31328.6067197378. The cubic root of 981481599 is about 993.7886992880.

The spelling of 981481599 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred ninety-nine".