188622947 has 2 divisors, whose sum is σ = 188622948. Its totient is φ = 188622946.

The previous prime is 188622913. The next prime is 188622971. The reversal of 188622947 is 749226881.

It is a happy number.

188622947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 188622947 - 2²⁰ = 187574371 is a prime.

It is a super-2 number, since 2×188622947² = 71157232269929618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (188621947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94311473 + 94311474.

It is an arithmetic number, because the mean of its divisors is an integer number (94311474).

Almost surely, 2^188622947 is an apocalyptic number.

188622947 is a deficient number, since it is larger than the sum of its proper divisors (1).

188622947 is an equidigital number, since it uses as much as digits as its factorization.

188622947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 188622947 is about 13734.0069535442. The cubic root of 188622947 is about 573.4974730223.

The spelling of 188622947 in words is "one hundred eighty-eight million, six hundred twenty-two thousand, nine hundred forty-seven".