340581811 has 4 divisors (see below), whose sum is σ = 340669000. Its totient is φ = 340494624.

The previous prime is 340581799. The next prime is 340581823. The reversal of 340581811 is 118185043.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (340581799) and next prime (340581823).

It is a cyclic number.

It is not a de Polignac number, because 340581811 - 2¹¹ = 340579763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340581851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37446 + ... + 45643.

It is an arithmetic number, because the mean of its divisors is an integer number (85167250).

Almost surely, 2^340581811 is an apocalyptic number.

340581811 is a deficient number, since it is larger than the sum of its proper divisors (87189).

340581811 is an equidigital number, since it uses as much as digits as its factorization.

340581811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87188.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 340581811 is about 18454.8587369289. The cubic root of 340581811 is about 698.3510923816.

The spelling of 340581811 in words is "three hundred forty million, five hundred eighty-one thousand, eight hundred eleven".