340374257 has 4 divisors (see below), whose sum is σ = 340428660. Its totient is φ = 340319856.

The previous prime is 340374241. The next prime is 340374311. The reversal of 340374257 is 752473043.

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

It can be written as a sum of positive squares in 2 ways, for example, as 317944561 + 22429696 = 17831^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 340374257 - 2⁴ = 340374241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340374757) 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, 16382 + ... + 30807.

It is an arithmetic number, because the mean of its divisors is an integer number (85107165).

Almost surely, 2^340374257 is an apocalyptic number.

It is an amenable number.

340374257 is a deficient number, since it is larger than the sum of its proper divisors (54403).

340374257 is an equidigital number, since it uses as much as digits as its factorization.

340374257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54402.

The product of its (nonzero) digits is 70560, while the sum is 35.

The square root of 340374257 is about 18449.2345911694. The cubic root of 340374257 is about 698.2092028153.

The spelling of 340374257 in words is "three hundred forty million, three hundred seventy-four thousand, two hundred fifty-seven".