340579891 has 2 divisors, whose sum is σ = 340579892. Its totient is φ = 340579890.

The previous prime is 340579873. The next prime is 340579991. The reversal of 340579891 is 198975043.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (198975043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340579891 - 2⁵ = 340579859 is a prime.

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, 170289945 + 170289946.

It is an arithmetic number, because the mean of its divisors is an integer number (170289946).

Almost surely, 2^340579891 is an apocalyptic number.

340579891 is a deficient number, since it is larger than the sum of its proper divisors (1).

340579891 is an equidigital number, since it uses as much as digits as its factorization.

340579891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 340579891 is about 18454.8067180342. The cubic root of 340579891 is about 698.3497800815.

The spelling of 340579891 in words is "three hundred forty million, five hundred seventy-nine thousand, eight hundred ninety-one".