340579991 has 2 divisors, whose sum is σ = 340579992. Its totient is φ = 340579990.

The previous prime is 340579891. The next prime is 340580033. The reversal of 340579991 is 199975043.

It is a strong prime.

It is an emirp because it is prime and its reverse (199975043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340579991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340579691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170289995 + 170289996.

It is an arithmetic number, because the mean of its divisors is an integer number (170289996).

Almost surely, 2^340579991 is an apocalyptic number.

340579991 is a deficient number, since it is larger than the sum of its proper divisors (1).

340579991 is an equidigital number, since it uses as much as digits as its factorization.

340579991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 340579991 is about 18454.8094273552. The cubic root of 340579991 is about 698.3498484306.

The spelling of 340579991 in words is "three hundred forty million, five hundred seventy-nine thousand, nine hundred ninety-one".