351665887 has 2 divisors, whose sum is σ = 351665888. Its totient is φ = 351665886.

The previous prime is 351665869. The next prime is 351665917. The reversal of 351665887 is 788566153.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 351665887 - 2¹⁵ = 351633119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 351665887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351665827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175832943 + 175832944.

It is an arithmetic number, because the mean of its divisors is an integer number (175832944).

Almost surely, 2^351665887 is an apocalyptic number.

351665887 is a deficient number, since it is larger than the sum of its proper divisors (1).

351665887 is an equidigital number, since it uses as much as digits as its factorization.

351665887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 49.

The square root of 351665887 is about 18752.7567840038. The cubic root of 351665887 is about 705.8461995142.

The spelling of 351665887 in words is "three hundred fifty-one million, six hundred sixty-five thousand, eight hundred eighty-seven".