340015649 has 2 divisors, whose sum is σ = 340015650. Its totient is φ = 340015648.

The previous prime is 340015631. The next prime is 340015651. The reversal of 340015649 is 946510043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303630625 + 36385024 = 17425^2 + 6032^2 .

It is a cyclic number.

It is not a de Polignac number, because 340015649 - 2¹⁶ = 339950113 is a prime.

It is a super-2 number, since 2×340015649² = 231221283129782402, which contains 22 as substring.

Together with 340015651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340015619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170007824 + 170007825.

It is an arithmetic number, because the mean of its divisors is an integer number (170007825).

Almost surely, 2^340015649 is an apocalyptic number.

It is an amenable number.

340015649 is a deficient number, since it is larger than the sum of its proper divisors (1).

340015649 is an equidigital number, since it uses as much as digits as its factorization.

340015649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 340015649 is about 18439.5132527949. The cubic root of 340015649 is about 697.9639126342.

The spelling of 340015649 in words is "three hundred forty million, fifteen thousand, six hundred forty-nine".