345712019 has 4 divisors (see below), whose sum is σ = 345754296. Its totient is φ = 345669744.

The previous prime is 345712009. The next prime is 345712021. The reversal of 345712019 is 910217543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 910217543 = 13859 ⋅65677.

It is a cyclic number.

It is not a de Polignac number, because 345712019 - 2⁸ = 345711763 is a prime.

It is a super-2 number, since 2×345712019² = 239033600162112722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345712009) 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, 4514 + ... + 26679.

It is an arithmetic number, because the mean of its divisors is an integer number (86438574).

Almost surely, 2^345712019 is an apocalyptic number.

345712019 is a deficient number, since it is larger than the sum of its proper divisors (42277).

345712019 is a wasteful number, since it uses less digits than its factorization.

345712019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42276.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 345712019 is about 18593.3326490976. The cubic root of 345712019 is about 701.8400697082.

The spelling of 345712019 in words is "three hundred forty-five million, seven hundred twelve thousand, nineteen".