1108701981 has 36 divisors (see below), whose sum is σ = 1668972448. Its totient is φ = 708846768.

The previous prime is 1108701977. The next prime is 1108701983. The reversal of 1108701981 is 1891078011.

It is a happy number.

It is not a de Polignac number, because 1108701981 - 2² = 1108701977 is a prime.

It is a super-2 number, since 2×1108701981² = 2458440165346648722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1108701983) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1346736 + ... + 1347558.

Almost surely, 2^1108701981 is an apocalyptic number.

It is an amenable number.

1108701981 is a deficient number, since it is larger than the sum of its proper divisors (560270467).

1108701981 is an equidigital number, since it uses as much as digits as its factorization.

1108701981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 36.

The square root of 1108701981 is about 33297.1767722130. The cubic root of 1108701981 is about 1034.9950542367.

Adding to 1108701981 its reverse (1891078011), we get a palindrome (2999779992).

The spelling of 1108701981 in words is "one billion, one hundred eight million, seven hundred one thousand, nine hundred eighty-one".