340644131 has 4 divisors (see below), whose sum is σ = 341431272. Its totient is φ = 339856992.

The previous prime is 340644119. The next prime is 340644133. The reversal of 340644131 is 131446043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340644131 is a prime.

It is a super-2 number, since 2×340644131² = 232076847969490322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340644131.

It is not an unprimeable number, because it can be changed into a prime (340644133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392921 + ... + 393786.

It is an arithmetic number, because the mean of its divisors is an integer number (85357818).

Almost surely, 2^340644131 is an apocalyptic number.

340644131 is a deficient number, since it is larger than the sum of its proper divisors (787141).

340644131 is an equidigital number, since it uses as much as digits as its factorization.

340644131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787140.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 340644131 is about 18456.5471039412. The cubic root of 340644131 is about 698.3936847773.

The spelling of 340644131 in words is "three hundred forty million, six hundred forty-four thousand, one hundred thirty-one".