340813897 has 4 divisors (see below), whose sum is σ = 343940740. Its totient is φ = 337687056.

The previous prime is 340813883. The next prime is 340813927. The reversal of 340813897 is 798318043.

It is a happy number.

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 129140496 + 211673401 = 11364^2 + 14549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340813897 is a prime.

It is a super-2 number, since 2×340813897² = 232308224776653218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340813817) 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, 1563258 + ... + 1563475.

It is an arithmetic number, because the mean of its divisors is an integer number (85985185).

Almost surely, 2^340813897 is an apocalyptic number.

It is an amenable number.

340813897 is a deficient number, since it is larger than the sum of its proper divisors (3126843).

340813897 is a wasteful number, since it uses less digits than its factorization.

340813897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3126842.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 340813897 is about 18461.1456036726. The cubic root of 340813897 is about 698.5096844388.

The spelling of 340813897 in words is "three hundred forty million, eight hundred thirteen thousand, eight hundred ninety-seven".