340312769 has 2 divisors, whose sum is σ = 340312770. Its totient is φ = 340312768.

The previous prime is 340312747. The next prime is 340312789. The reversal of 340312769 is 967213043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339001744 + 1311025 = 18412^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 340312769 - 2¹² = 340308673 is a prime.

It is a super-2 number, since 2×340312769² = 231625561488894722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340312789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170156384 + 170156385.

It is an arithmetic number, because the mean of its divisors is an integer number (170156385).

Almost surely, 2^340312769 is an apocalyptic number.

It is an amenable number.

340312769 is a deficient number, since it is larger than the sum of its proper divisors (1).

340312769 is an equidigital number, since it uses as much as digits as its factorization.

340312769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 340312769 is about 18447.5681053086. The cubic root of 340312769 is about 698.1671568693.

The spelling of 340312769 in words is "three hundred forty million, three hundred twelve thousand, seven hundred sixty-nine".