434428187 has 2 divisors, whose sum is σ = 434428188. Its totient is φ = 434428186.

The previous prime is 434428171. The next prime is 434428193. The reversal of 434428187 is 781824434.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 434428187 - 2⁴ = 434428171 is a prime.

It is not a weakly prime, because it can be changed into another prime (434428157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217214093 + 217214094.

It is an arithmetic number, because the mean of its divisors is an integer number (217214094).

Almost surely, 2^434428187 is an apocalyptic number.

434428187 is a deficient number, since it is larger than the sum of its proper divisors (1).

434428187 is an equidigital number, since it uses as much as digits as its factorization.

434428187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 41.

The square root of 434428187 is about 20842.9409393204. The cubic root of 434428187 is about 757.3663381749.

The spelling of 434428187 in words is "four hundred thirty-four million, four hundred twenty-eight thousand, one hundred eighty-seven".