434021387 has 2 divisors, whose sum is σ = 434021388. Its totient is φ = 434021386.

The previous prime is 434021369. The next prime is 434021437. The reversal of 434021387 is 783120434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 434021387 - 2²⁴ = 417244171 is a prime.

It is not a weakly prime, because it can be changed into another prime (434021327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217010693 + 217010694.

It is an arithmetic number, because the mean of its divisors is an integer number (217010694).

Almost surely, 2^434021387 is an apocalyptic number.

434021387 is a deficient number, since it is larger than the sum of its proper divisors (1).

434021387 is an equidigital number, since it uses as much as digits as its factorization.

434021387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 434021387 is about 20833.1799541021. The cubic root of 434021387 is about 757.1298642280.

The spelling of 434021387 in words is "four hundred thirty-four million, twenty-one thousand, three hundred eighty-seven".