11618947 has 2 divisors, whose sum is σ = 11618948. Its totient is φ = 11618946.

The previous prime is 11618941. The next prime is 11618953. The reversal of 11618947 is 74981611.

It is a balanced prime because it is at equal distance from previous prime (11618941) and next prime (11618953).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11618947 is a prime.

It is equal to p₇₆₄₆₈₆ and since 11618947 and 764686 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (11618941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809473 + 5809474.

It is an arithmetic number, because the mean of its divisors is an integer number (5809474).

Almost surely, 2^11618947 is an apocalyptic number.

11618947 is a deficient number, since it is larger than the sum of its proper divisors (1).

11618947 is an equidigital number, since it uses as much as digits as its factorization.

11618947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 37.

The square root of 11618947 is about 3408.6576536813. The cubic root of 11618947 is about 226.4934203379.

The spelling of 11618947 in words is "eleven million, six hundred eighteen thousand, nine hundred forty-seven".