343815961 has 2 divisors, whose sum is σ = 343815962. Its totient is φ = 343815960.

The previous prime is 343815959. The next prime is 343816021. The reversal of 343815961 is 169518343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289646361 + 54169600 = 17019^2 + 7360^2 .

It is a cyclic number.

It is not a de Polignac number, because 343815961 - 2¹ = 343815959 is a prime.

Together with 343815959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (343815161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171907980 + 171907981.

It is an arithmetic number, because the mean of its divisors is an integer number (171907981).

Almost surely, 2^343815961 is an apocalyptic number.

It is an amenable number.

343815961 is a deficient number, since it is larger than the sum of its proper divisors (1).

343815961 is an equidigital number, since it uses as much as digits as its factorization.

343815961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 343815961 is about 18542.2749682988. The cubic root of 343815961 is about 700.5546359355.

The spelling of 343815961 in words is "three hundred forty-three million, eight hundred fifteen thousand, nine hundred sixty-one".