340126399 has 4 divisors (see below), whose sum is σ = 340168536. Its totient is φ = 340084264.

The previous prime is 340126351. The next prime is 340126411. The reversal of 340126399 is 993621043.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 993621043 = 13963 ⋅71161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340126399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340126309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4744 + ... + 26509.

It is an arithmetic number, because the mean of its divisors is an integer number (85042134).

Almost surely, 2^340126399 is an apocalyptic number.

340126399 is a deficient number, since it is larger than the sum of its proper divisors (42137).

340126399 is a wasteful number, since it uses less digits than its factorization.

340126399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42136.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 340126399 is about 18442.5160702112. The cubic root of 340126399 is about 698.0396847468.

The spelling of 340126399 in words is "three hundred forty million, one hundred twenty-six thousand, three hundred ninety-nine".