434178915389 has 2 divisors, whose sum is σ = 434178915390. Its totient is φ = 434178915388.

The previous prime is 434178915329. The next prime is 434178915409. The reversal of 434178915389 is 983519871434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408998620900 + 25180294489 = 639530^2 + 158683^2 .

It is a cyclic number.

It is not a de Polignac number, because 434178915389 - 2⁸ = 434178915133 is a prime.

It is a super-2 number, since 2×434178915389² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434178915329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217089457694 + 217089457695.

It is an arithmetic number, because the mean of its divisors is an integer number (217089457695).

Almost surely, 2^434178915389 is an apocalyptic number.

It is an amenable number.

434178915389 is a deficient number, since it is larger than the sum of its proper divisors (1).

434178915389 is an equidigital number, since it uses as much as digits as its factorization.

434178915389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 62.

The spelling of 434178915389 in words is "four hundred thirty-four billion, one hundred seventy-eight million, nine hundred fifteen thousand, three hundred eighty-nine".