188529421 has 2 divisors, whose sum is σ = 188529422. Its totient is φ = 188529420.

The previous prime is 188529401. The next prime is 188529443. The reversal of 188529421 is 124925881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188073796 + 455625 = 13714^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 188529421 - 2⁷ = 188529293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188529401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94264710 + 94264711.

It is an arithmetic number, because the mean of its divisors is an integer number (94264711).

Almost surely, 2^188529421 is an apocalyptic number.

It is an amenable number.

188529421 is a deficient number, since it is larger than the sum of its proper divisors (1).

188529421 is an equidigital number, since it uses as much as digits as its factorization.

188529421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The square root of 188529421 is about 13730.6016255662. The cubic root of 188529421 is about 573.4026705022.

The spelling of 188529421 in words is "one hundred eighty-eight million, five hundred twenty-nine thousand, four hundred twenty-one".