340708981 has 2 divisors, whose sum is σ = 340708982. Its totient is φ = 340708980.

The previous prime is 340708967. The next prime is 340708993. The reversal of 340708981 is 189807043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187964100 + 152744881 = 13710^2 + 12359^2 .

It is an emirp because it is prime and its reverse (189807043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340708981 - 2⁷ = 340708853 is a prime.

It is a super-2 number, since 2×340708981² = 232165219468116722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340708681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170354490 + 170354491.

It is an arithmetic number, because the mean of its divisors is an integer number (170354491).

Almost surely, 2^340708981 is an apocalyptic number.

It is an amenable number.

340708981 is a deficient number, since it is larger than the sum of its proper divisors (1).

340708981 is an equidigital number, since it uses as much as digits as its factorization.

340708981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 340708981 is about 18458.3038494874. The cubic root of 340708981 is about 698.4380007781.

The spelling of 340708981 in words is "three hundred forty million, seven hundred eight thousand, nine hundred eighty-one".