345043691 has 4 divisors (see below), whose sum is σ = 345412872. Its totient is φ = 344674512.

The previous prime is 345043619. The next prime is 345043703. The reversal of 345043691 is 196340543.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345043691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345043291) 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, 183185 + ... + 185058.

It is an arithmetic number, because the mean of its divisors is an integer number (86353218).

Almost surely, 2^345043691 is an apocalyptic number.

345043691 is a deficient number, since it is larger than the sum of its proper divisors (369181).

345043691 is an equidigital number, since it uses as much as digits as its factorization.

345043691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369180.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 345043691 is about 18575.3517059570. The cubic root of 345043691 is about 701.3875138909.

The spelling of 345043691 in words is "three hundred forty-five million, forty-three thousand, six hundred ninety-one".