188924993 has 2 divisors, whose sum is σ = 188924994. Its totient is φ = 188924992.

The previous prime is 188924977. The next prime is 188925001. The reversal of 188924993 is 399429881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99660289 + 89264704 = 9983^2 + 9448^2 .

It is a cyclic number.

It is not a de Polignac number, because 188924993 - 2⁴ = 188924977 is a prime.

It is not a weakly prime, because it can be changed into another prime (188924933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94462496 + 94462497.

It is an arithmetic number, because the mean of its divisors is an integer number (94462497).

Almost surely, 2^188924993 is an apocalyptic number.

It is an amenable number.

188924993 is a deficient number, since it is larger than the sum of its proper divisors (1).

188924993 is an equidigital number, since it uses as much as digits as its factorization.

188924993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 188924993 is about 13744.9988359403. The cubic root of 188924993 is about 573.8034277341.

The spelling of 188924993 in words is "one hundred eighty-eight million, nine hundred twenty-four thousand, nine hundred ninety-three".