109797981 has 8 divisors (see below), whose sum is σ = 150354144. Its totient is φ = 71220240.

The previous prime is 109797971. The next prime is 109798027. The reversal of 109797981 is 189797901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109797981 - 2¹³ = 109789789 is a prime.

It is a super-2 number, since 2×109797981² = 24111193263352722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109797901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494475 + ... + 494696.

It is an arithmetic number, because the mean of its divisors is an integer number (18794268).

Almost surely, 2^109797981 is an apocalyptic number.

It is an amenable number.

109797981 is a deficient number, since it is larger than the sum of its proper divisors (40556163).

109797981 is an equidigital number, since it uses as much as digits as its factorization.

109797981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989211.

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 109797981 is about 10478.4531778312. The cubic root of 109797981 is about 478.8484853982.

The spelling of 109797981 in words is "one hundred nine million, seven hundred ninety-seven thousand, nine hundred eighty-one".