340421437 has 2 divisors, whose sum is σ = 340421438. Its totient is φ = 340421436.

The previous prime is 340421407. The next prime is 340421441. The reversal of 340421437 is 734124043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333099001 + 7322436 = 18251^2 + 2706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340421437 is a prime.

It is a super-3 number, since 3×340421437³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340421407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170210718 + 170210719.

It is an arithmetic number, because the mean of its divisors is an integer number (170210719).

Almost surely, 2^340421437 is an apocalyptic number.

It is an amenable number.

340421437 is a deficient number, since it is larger than the sum of its proper divisors (1).

340421437 is an equidigital number, since it uses as much as digits as its factorization.

340421437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 340421437 is about 18450.5131906947. The cubic root of 340421437 is about 698.2414614126.

The spelling of 340421437 in words is "three hundred forty million, four hundred twenty-one thousand, four hundred thirty-seven".