345619889 has 2 divisors, whose sum is σ = 345619890. Its totient is φ = 345619888.

The previous prime is 345619801. The next prime is 345619907. The reversal of 345619889 is 988916543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202578289 + 143041600 = 14233^2 + 11960^2 .

It is a cyclic number.

It is not a de Polignac number, because 345619889 - 2¹² = 345615793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345619889.

It is not a weakly prime, because it can be changed into another prime (345619289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172809944 + 172809945.

It is an arithmetic number, because the mean of its divisors is an integer number (172809945).

Almost surely, 2^345619889 is an apocalyptic number.

It is an amenable number.

345619889 is a deficient number, since it is larger than the sum of its proper divisors (1).

345619889 is an equidigital number, since it uses as much as digits as its factorization.

345619889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 345619889 is about 18590.8549830286. The cubic root of 345619889 is about 701.7777189010. Note that the first 4 decimals are identical.

The spelling of 345619889 in words is "three hundred forty-five million, six hundred nineteen thousand, eight hundred eighty-nine".