340440131 has 2 divisors, whose sum is σ = 340440132. Its totient is φ = 340440130.

The previous prime is 340440127. The next prime is 340440143. The reversal of 340440131 is 131044043.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340440131 - 2² = 340440127 is a prime.

It is a super-2 number, since 2×340440131² = 231798965590594322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340440631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170220065 + 170220066.

It is an arithmetic number, because the mean of its divisors is an integer number (170220066).

Almost surely, 2^340440131 is an apocalyptic number.

340440131 is a deficient number, since it is larger than the sum of its proper divisors (1).

340440131 is an equidigital number, since it uses as much as digits as its factorization.

340440131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 340440131 is about 18451.0197821150. The cubic root of 340440131 is about 698.2542423223.

Adding to 340440131 its reverse (131044043), we get a palindrome (471484174).

The spelling of 340440131 in words is "three hundred forty million, four hundred forty thousand, one hundred thirty-one".