345436789 has 2 divisors, whose sum is σ = 345436790. Its totient is φ = 345436788.

The previous prime is 345436783. The next prime is 345436807. The reversal of 345436789 is 987634543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345327889 + 108900 = 18583^2 + 330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345436789 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345436783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172718394 + 172718395.

It is an arithmetic number, because the mean of its divisors is an integer number (172718395).

Almost surely, 2^345436789 is an apocalyptic number.

It is an amenable number.

345436789 is a deficient number, since it is larger than the sum of its proper divisors (1).

345436789 is an equidigital number, since it uses as much as digits as its factorization.

345436789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The square root of 345436789 is about 18585.9298664339. The cubic root of 345436789 is about 701.6537694388.

The spelling of 345436789 in words is "three hundred forty-five million, four hundred thirty-six thousand, seven hundred eighty-nine".