345399739 has 4 divisors (see below), whose sum is σ = 345587200. Its totient is φ = 345212280.

The previous prime is 345399721. The next prime is 345399793. The reversal of 345399739 is 937993543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937993543 = 379 ⋅2474917.

It is a cyclic number.

It is not a de Polignac number, because 345399739 - 2⁹ = 345399227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345399239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90939 + ... + 94660.

It is an arithmetic number, because the mean of its divisors is an integer number (86396800).

Almost surely, 2^345399739 is an apocalyptic number.

345399739 is a deficient number, since it is larger than the sum of its proper divisors (187461).

345399739 is a wasteful number, since it uses less digits than its factorization.

345399739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187460.

The product of its digits is 2755620, while the sum is 52.

The square root of 345399739 is about 18584.9331179857. The cubic root of 345399739 is about 701.6286831302.

The spelling of 345399739 in words is "three hundred forty-five million, three hundred ninety-nine thousand, seven hundred thirty-nine".