111661490 has 8 divisors (see below), whose sum is σ = 200990700. Its totient is φ = 44664592.

The previous prime is 111661471. The next prime is 111661493. The reversal of 111661490 is 94166111.

It is a Cunningham number, because it is equal to 10567²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 111661489 + 1 = 10567^2 + 1^2 .

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 (111661493) 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, 5583065 + ... + 5583084.

Almost surely, 2^111661490 is an apocalyptic number.

111661490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111661490 is a deficient number, since it is larger than the sum of its proper divisors (89329210).

111661490 is a wasteful number, since it uses less digits than its factorization.

111661490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11166156.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 111661490 is about 10567.0000473171. Note that the first 4 decimals coincide. The cubic root of 111661490 is about 481.5423334346.

The spelling of 111661490 in words is "one hundred eleven million, six hundred sixty-one thousand, four hundred ninety".