11961898 has 8 divisors (see below), whose sum is σ = 19323108. Its totient is φ = 5520864.

The previous prime is 11961871. The next prime is 11961899. The reversal of 11961898 is 89816911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11881809 + 80089 = 3447^2 + 283^2 .

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 (11961899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230011 + ... + 230062.

Almost surely, 2^11961898 is an apocalyptic number.

11961898 is a deficient number, since it is larger than the sum of its proper divisors (7361210).

11961898 is a wasteful number, since it uses less digits than its factorization.

11961898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460088.

The product of its digits is 31104, while the sum is 43.

The square root of 11961898 is about 3458.5976927073. The cubic root of 11961898 is about 228.7002810315.

It can be divided in two parts, 119618 and 98, that added together give a square (119716 = 346²).

The spelling of 11961898 in words is "eleven million, nine hundred sixty-one thousand, eight hundred ninety-eight".