340426987 has 2 divisors, whose sum is σ = 340426988. Its totient is φ = 340426986.

The previous prime is 340426981. The next prime is 340427039. The reversal of 340426987 is 789624043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340426987 - 2⁷ = 340426859 is a prime.

It is not a weakly prime, because it can be changed into another prime (340426981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170213493 + 170213494.

It is an arithmetic number, because the mean of its divisors is an integer number (170213494).

Almost surely, 2^340426987 is an apocalyptic number.

340426987 is a deficient number, since it is larger than the sum of its proper divisors (1).

340426987 is an equidigital number, since it uses as much as digits as its factorization.

340426987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 340426987 is about 18450.6635924023. The cubic root of 340426987 is about 698.2452559435.

The spelling of 340426987 in words is "three hundred forty million, four hundred twenty-six thousand, nine hundred eighty-seven".