981209115 has 24 divisors (see below), whose sum is σ = 1790277840. Its totient is φ = 495768384.

The previous prime is 981209093. The next prime is 981209161. The reversal of 981209115 is 511902189.

It is not a de Polignac number, because 981209115 - 2⁸ = 981208859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981209115.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 572952 + ... + 574661.

It is an arithmetic number, because the mean of its divisors is an integer number (74594910).

Almost surely, 2^981209115 is an apocalyptic number.

981209115 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

981209115 is a deficient number, since it is larger than the sum of its proper divisors (809068725).

981209115 is a wasteful number, since it uses less digits than its factorization.

981209115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147643 (or 1147640 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 981209115 is about 31324.2576129108. The cubic root of 981209115 is about 993.6967238556.

The spelling of 981209115 in words is "nine hundred eighty-one million, two hundred nine thousand, one hundred fifteen".