345669993 has 12 divisors (see below), whose sum is σ = 528671988. Its totient is φ = 216890880.

The previous prime is 345669979. The next prime is 345670019. The reversal of 345669993 is 399966543.

It can be written as a sum of positive squares in 2 ways, for example, as 221057424 + 124612569 = 14868^2 + 11163^2 .

It is not a de Polignac number, because 345669993 - 2⁴ = 345669977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345669923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1129488 + ... + 1129793.

It is an arithmetic number, because the mean of its divisors is an integer number (44055999).

Almost surely, 2^345669993 is an apocalyptic number.

It is an amenable number.

345669993 is a deficient number, since it is larger than the sum of its proper divisors (183001995).

345669993 is a wasteful number, since it uses less digits than its factorization.

345669993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259304 (or 2259301 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 54.

The square root of 345669993 is about 18592.2024784585. The cubic root of 345669993 is about 701.8116291523.

The spelling of 345669993 in words is "three hundred forty-five million, six hundred sixty-nine thousand, nine hundred ninety-three".