340997657 has 16 divisors (see below), whose sum is σ = 457844352. Its totient is φ = 245272320.

The previous prime is 340997653. The next prime is 340997663. The reversal of 340997657 is 756799043.

It is a cyclic number.

It is not a de Polignac number, because 340997657 - 2² = 340997653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340997653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169328 + ... + 171329.

It is an arithmetic number, because the mean of its divisors is an integer number (28615272).

Almost surely, 2^340997657 is an apocalyptic number.

It is an amenable number.

340997657 is a deficient number, since it is larger than the sum of its proper divisors (116846695).

340997657 is a wasteful number, since it uses less digits than its factorization.

340997657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340688.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 340997657 is about 18466.1218722286. The cubic root of 340997657 is about 698.6352026745.

The spelling of 340997657 in words is "three hundred forty million, nine hundred ninety-seven thousand, six hundred fifty-seven".