981117236 has 12 divisors (see below), whose sum is σ = 1873042080. Its totient is φ = 445962360.

The previous prime is 981117191. The next prime is 981117253. The reversal of 981117236 is 632711189.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 981117236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11149016 + ... + 11149103.

It is an arithmetic number, because the mean of its divisors is an integer number (156086840).

Almost surely, 2^981117236 is an apocalyptic number.

It is an amenable number.

981117236 is a deficient number, since it is larger than the sum of its proper divisors (891924844).

981117236 is a wasteful number, since it uses less digits than its factorization.

981117236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22298134 (or 22298132 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 981117236 is about 31322.7909995262. The cubic root of 981117236 is about 993.6657067803.

The spelling of 981117236 in words is "nine hundred eighty-one million, one hundred seventeen thousand, two hundred thirty-six".