11722618 has 4 divisors (see below), whose sum is σ = 17583930. Its totient is φ = 5861308.

The previous prime is 11722591. The next prime is 11722621. The reversal of 11722618 is 81622711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81622711 = 4967 ⋅16433.

It can be written as a sum of positive squares in only one way, i.e., 7198489 + 4524129 = 2683^2 + 2127^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2930653 + ... + 2930656.

Almost surely, 2^11722618 is an apocalyptic number.

11722618 is a deficient number, since it is larger than the sum of its proper divisors (5861312).

11722618 is an equidigital number, since it uses as much as digits as its factorization.

11722618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5861311.

The product of its digits is 1344, while the sum is 28.

The square root of 11722618 is about 3423.8308953568. The cubic root of 11722618 is about 227.1650620126.

The spelling of 11722618 in words is "eleven million, seven hundred twenty-two thousand, six hundred eighteen".