4345678789 has 2 divisors, whose sum is σ = 4345678790. Its totient is φ = 4345678788.

The previous prime is 4345678783. The next prime is 4345678819. The reversal of 4345678789 is 9878765434.

It is a happy number.

4345678789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4322010564 + 23668225 = 65742^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 4345678789 - 2³ = 4345678781 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4345678781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2172839394 + 2172839395.

It is an arithmetic number, because the mean of its divisors is an integer number (2172839395).

Almost surely, 2^4345678789 is an apocalyptic number.

It is an amenable number.

4345678789 is a deficient number, since it is larger than the sum of its proper divisors (1).

4345678789 is an equidigital number, since it uses as much as digits as its factorization.

4345678789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40642560, while the sum is 61.

The square root of 4345678789 is about 65921.7626357184. The cubic root of 4345678789 is about 1631.8711858323.

The spelling of 4345678789 in words is "four billion, three hundred forty-five million, six hundred seventy-eight thousand, seven hundred eighty-nine".