343403887 has 2 divisors, whose sum is σ = 343403888. Its totient is φ = 343403886.

The previous prime is 343403873. The next prime is 343403897. The reversal of 343403887 is 788304343.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343403887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343403867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171701943 + 171701944.

It is an arithmetic number, because the mean of its divisors is an integer number (171701944).

Almost surely, 2^343403887 is an apocalyptic number.

343403887 is a deficient number, since it is larger than the sum of its proper divisors (1).

343403887 is an equidigital number, since it uses as much as digits as its factorization.

343403887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 343403887 is about 18531.1598935415. The cubic root of 343403887 is about 700.2746452899.

The spelling of 343403887 in words is "three hundred forty-three million, four hundred three thousand, eight hundred eighty-seven".