345491091 has 24 divisors (see below), whose sum is σ = 545394096. Its totient is φ = 209010240.

The previous prime is 345491077. The next prime is 345491099. The reversal of 345491091 is 190194543.

It is a happy number.

345491091 is a `hidden beast` number, since 3 + 4 + 549 + 109 + 1 = 666.

It is not a de Polignac number, because 345491091 - 2¹⁴ = 345474707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345491099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57841 + ... + 63533.

It is an arithmetic number, because the mean of its divisors is an integer number (22724754).

Almost surely, 2^345491091 is an apocalyptic number.

345491091 is a deficient number, since it is larger than the sum of its proper divisors (199903005).

345491091 is a wasteful number, since it uses less digits than its factorization.

345491091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323 (or 6320 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 345491091 is about 18587.3906452735. The cubic root of 345491091 is about 701.6905337209.

The spelling of 345491091 in words is "three hundred forty-five million, four hundred ninety-one thousand, ninety-one".