340120997 has 2 divisors, whose sum is σ = 340120998. Its totient is φ = 340120996.

The previous prime is 340120993. The next prime is 340121039. The reversal of 340120997 is 799021043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241833601 + 98287396 = 15551^2 + 9914^2 .

It is an emirp because it is prime and its reverse (799021043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340120997 - 2² = 340120993 is a prime.

It is a Chen prime.

It is equal to p_18300878 and since 340120997 and 18300878 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340120993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170060498 + 170060499.

It is an arithmetic number, because the mean of its divisors is an integer number (170060499).

Almost surely, 2^340120997 is an apocalyptic number.

It is an amenable number.

340120997 is a deficient number, since it is larger than the sum of its proper divisors (1).

340120997 is an equidigital number, since it uses as much as digits as its factorization.

340120997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 340120997 is about 18442.3696145588. The cubic root of 340120997 is about 698.0359892282.

The spelling of 340120997 in words is "three hundred forty million, one hundred twenty thousand, nine hundred ninety-seven".