111961090 has 8 divisors (see below), whose sum is σ = 201529980. Its totient is φ = 44784432.

The previous prime is 111961063. The next prime is 111961093. The reversal of 111961090 is 90169111.

It can be written as a sum of positive squares in 2 ways, for example, as 96255721 + 15705369 = 9811^2 + 3963^2 .

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

It is not an unprimeable number, because it can be changed into a prime (111961093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5598045 + ... + 5598064.

Almost surely, 2^111961090 is an apocalyptic number.

111961090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111961090 is a deficient number, since it is larger than the sum of its proper divisors (89568890).

111961090 is a wasteful number, since it uses less digits than its factorization.

111961090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11196116.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 111961090 is about 10581.1667598616. The cubic root of 111961090 is about 481.9726257532.

The spelling of 111961090 in words is "one hundred eleven million, nine hundred sixty-one thousand, ninety".