345212691 has 32 divisors (see below), whose sum is σ = 496800000. Its totient is φ = 212554368.

The previous prime is 345212689. The next prime is 345212719. The reversal of 345212691 is 196212543.

It is not a de Polignac number, because 345212691 - 2¹ = 345212689 is a prime.

It is a super-2 number, since 2×345212691² = 238343604054922962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (345212671) 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 31 ways as a sum of consecutive naturals, for example, 691560 + ... + 692058.

It is an arithmetic number, because the mean of its divisors is an integer number (15525000).

Almost surely, 2^345212691 is an apocalyptic number.

345212691 is a deficient number, since it is larger than the sum of its proper divisors (151587309).

345212691 is a wasteful number, since it uses less digits than its factorization.

345212691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its digits is 12960, while the sum is 33.

The square root of 345212691 is about 18579.9001881065. The cubic root of 345212691 is about 701.5020067757.

The spelling of 345212691 in words is "three hundred forty-five million, two hundred twelve thousand, six hundred ninety-one".