4340399491 has 2 divisors, whose sum is σ = 4340399492. Its totient is φ = 4340399490.

The previous prime is 4340399473. The next prime is 4340399507. The reversal of 4340399491 is 1949930434.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4340399491 - 2¹³ = 4340391299 is a prime.

It is not a weakly prime, because it can be changed into another prime (4340399431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2170199745 + 2170199746.

It is an arithmetic number, because the mean of its divisors is an integer number (2170199746).

Almost surely, 2^4340399491 is an apocalyptic number.

4340399491 is a deficient number, since it is larger than the sum of its proper divisors (1).

4340399491 is an equidigital number, since it uses as much as digits as its factorization.

4340399491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 4340399491 is about 65881.7083187739. The cubic root of 4340399491 is about 1631.2100980615.

The spelling of 4340399491 in words is "four billion, three hundred forty million, three hundred ninety-nine thousand, four hundred ninety-one".