349879687 has 2 divisors, whose sum is σ = 349879688. Its totient is φ = 349879686.

The previous prime is 349879637. The next prime is 349879709. The reversal of 349879687 is 786978943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349879687 - 2²⁷ = 215661959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349879637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174939843 + 174939844.

It is an arithmetic number, because the mean of its divisors is an integer number (174939844).

Almost surely, 2^349879687 is an apocalyptic number.

349879687 is a deficient number, since it is larger than the sum of its proper divisors (1).

349879687 is an equidigital number, since it uses as much as digits as its factorization.

349879687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 61.

The square root of 349879687 is about 18705.0711573092. The cubic root of 349879687 is about 704.6491133184.

The spelling of 349879687 in words is "three hundred forty-nine million, eight hundred seventy-nine thousand, six hundred eighty-seven".