340357081 has 2 divisors, whose sum is σ = 340357082. Its totient is φ = 340357080.

The previous prime is 340357057. The next prime is 340357103. The reversal of 340357081 is 180753043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299843856 + 40513225 = 17316^2 + 6365^2 .

It is an emirp because it is prime and its reverse (180753043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340357081 - 2⁷ = 340356953 is a prime.

It is a super-2 number, since 2×340357081² = 231685885173681122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (340357001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170178540 + 170178541.

It is an arithmetic number, because the mean of its divisors is an integer number (170178541).

Almost surely, 2^340357081 is an apocalyptic number.

It is an amenable number.

340357081 is a deficient number, since it is larger than the sum of its proper divisors (1).

340357081 is an equidigital number, since it uses as much as digits as its factorization.

340357081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 340357081 is about 18448.7690917308. The cubic root of 340357081 is about 698.1974582500.

The spelling of 340357081 in words is "three hundred forty million, three hundred fifty-seven thousand, eighty-one".