349645687 has 2 divisors, whose sum is σ = 349645688. Its totient is φ = 349645686.

The previous prime is 349645669. The next prime is 349645693. The reversal of 349645687 is 786546943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349645687 - 2²³ = 341257079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349645627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174822843 + 174822844.

It is an arithmetic number, because the mean of its divisors is an integer number (174822844).

Almost surely, 2^349645687 is an apocalyptic number.

349645687 is a deficient number, since it is larger than the sum of its proper divisors (1).

349645687 is an equidigital number, since it uses as much as digits as its factorization.

349645687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 52.

The square root of 349645687 is about 18698.8151228895. The cubic root of 349645687 is about 704.4919881967.

The spelling of 349645687 in words is "three hundred forty-nine million, six hundred forty-five thousand, six hundred eighty-seven".