434809678819 has 2 divisors, whose sum is σ = 434809678820. Its totient is φ = 434809678818.

The previous prime is 434809678799. The next prime is 434809678843. The reversal of 434809678819 is 918876908434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 434809678819 - 2¹³ = 434809670627 is a prime.

It is a super-2 number, since 2×434809678819² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (434809670819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217404839409 + 217404839410.

It is an arithmetic number, because the mean of its divisors is an integer number (217404839410).

Almost surely, 2^434809678819 is an apocalyptic number.

434809678819 is a deficient number, since it is larger than the sum of its proper divisors (1).

434809678819 is an equidigital number, since it uses as much as digits as its factorization.

434809678819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 83607552, while the sum is 67.

The spelling of 434809678819 in words is "four hundred thirty-four billion, eight hundred nine million, six hundred seventy-eight thousand, eight hundred nineteen".