340725691 has 4 divisors (see below), whose sum is σ = 341821584. Its totient is φ = 339629800.

The previous prime is 340725667. The next prime is 340725719. The reversal of 340725691 is 196527043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196527043 = 1319 ⋅148997.

It is a cyclic number.

It is not a de Polignac number, because 340725691 - 2⁵ = 340725659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 340725691.

It is not an unprimeable number, because it can be changed into a prime (340725641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547480 + ... + 548101.

It is an arithmetic number, because the mean of its divisors is an integer number (85455396).

Almost surely, 2^340725691 is an apocalyptic number.

340725691 is a deficient number, since it is larger than the sum of its proper divisors (1095893).

340725691 is a wasteful number, since it uses less digits than its factorization.

340725691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095892.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 340725691 is about 18458.7564857441. The cubic root of 340725691 is about 698.4494188395.

The spelling of 340725691 in words is "three hundred forty million, seven hundred twenty-five thousand, six hundred ninety-one".