351986399 has 4 divisors (see below), whose sum is σ = 352244136. Its totient is φ = 351728664.

The previous prime is 351986387. The next prime is 351986407. The reversal of 351986399 is 993689153.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 351986399 - 2¹² = 351982303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 351986399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351983399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126809 + ... + 129554.

It is an arithmetic number, because the mean of its divisors is an integer number (88061034).

Almost surely, 2^351986399 is an apocalyptic number.

351986399 is a deficient number, since it is larger than the sum of its proper divisors (257737).

351986399 is a wasteful number, since it uses less digits than its factorization.

351986399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257736.

The product of its digits is 1574640, while the sum is 53.

The square root of 351986399 is about 18761.3005679244. The cubic root of 351986399 is about 706.0605729580.

The spelling of 351986399 in words is "three hundred fifty-one million, nine hundred eighty-six thousand, three hundred ninety-nine".