188426429 has 2 divisors, whose sum is σ = 188426430. Its totient is φ = 188426428.

The previous prime is 188426411. The next prime is 188426461. The reversal of 188426429 is 924624881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 3602404 = 13595^2 + 1898^2 .

It is an emirp because it is prime and its reverse (924624881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188426429 - 2²⁴ = 171649213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188426429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188426729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94213214 + 94213215.

It is an arithmetic number, because the mean of its divisors is an integer number (94213215).

Almost surely, 2^188426429 is an apocalyptic number.

It is an amenable number.

188426429 is a deficient number, since it is larger than the sum of its proper divisors (1).

188426429 is an equidigital number, since it uses as much as digits as its factorization.

188426429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 188426429 is about 13726.8506584722. The cubic root of 188426429 is about 573.2982365016.

The spelling of 188426429 in words is "one hundred eighty-eight million, four hundred twenty-six thousand, four hundred twenty-nine".