345999771 has 24 divisors (see below), whose sum is σ = 539229600. Its totient is φ = 212524416.

The previous prime is 345999769. The next prime is 345999803. The reversal of 345999771 is 177999543.

It is a happy number.

It is not a de Polignac number, because 345999771 - 2¹ = 345999769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345999751) 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, 67615 + ... + 72551.

It is an arithmetic number, because the mean of its divisors is an integer number (22467900).

Almost surely, 2^345999771 is an apocalyptic number.

345999771 is a deficient number, since it is larger than the sum of its proper divisors (193229829).

345999771 is a wasteful number, since it uses less digits than its factorization.

345999771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555 (or 5552 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 345999771 is about 18601.0690821791. The cubic root of 345999771 is about 702.0347402877.

The spelling of 345999771 in words is "three hundred forty-five million, nine hundred ninety-nine thousand, seven hundred seventy-one".