13961018 has 4 divisors (see below), whose sum is σ = 20941530. Its totient is φ = 6980508.

The previous prime is 13960987. The next prime is 13961071. The reversal of 13961018 is 81016931.

It is a happy number.

13961018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81016931 = 19 ⋅4264049.

It can be written as a sum of positive squares in only one way, i.e., 8684809 + 5276209 = 2947^2 + 2297^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3490253 + ... + 3490256.

Almost surely, 2^13961018 is an apocalyptic number.

13961018 is a deficient number, since it is larger than the sum of its proper divisors (6980512).

13961018 is an equidigital number, since it uses as much as digits as its factorization.

13961018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980511.

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

The square root of 13961018 is about 3736.4445666971. Note that the first 3 decimals coincide. The cubic root of 13961018 is about 240.7903228415.

Adding to 13961018 its reverse (81016931), we get a palindrome (94977949).

The spelling of 13961018 in words is "thirteen million, nine hundred sixty-one thousand, eighteen".