345885991 has 16 divisors (see below), whose sum is σ = 380943648. Its totient is φ = 311449600.

The previous prime is 345885979. The next prime is 345885997. The reversal of 345885991 is 199588543.

It is not a de Polignac number, because 345885991 - 2⁹ = 345885479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345885997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979671 + ... + 980023.

It is an arithmetic number, because the mean of its divisors is an integer number (23808978).

Almost surely, 2^345885991 is an apocalyptic number.

345885991 is a deficient number, since it is larger than the sum of its proper divisors (35057657).

345885991 is a wasteful number, since it uses less digits than its factorization.

345885991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its digits is 1555200, while the sum is 52.

The square root of 345885991 is about 18598.0104043416. The cubic root of 345885991 is about 701.9577785122.

The spelling of 345885991 in words is "three hundred forty-five million, eight hundred eighty-five thousand, nine hundred ninety-one".