348564509 has 2 divisors, whose sum is σ = 348564510. Its totient is φ = 348564508.

The previous prime is 348564497. The next prime is 348564523. The reversal of 348564509 is 905465843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175642009 + 172922500 = 13253^2 + 13150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-348564509 is a prime.

It is a super-2 number, since 2×348564509² = 242994433868822162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 348564509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (348564409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174282254 + 174282255.

It is an arithmetic number, because the mean of its divisors is an integer number (174282255).

Almost surely, 2^348564509 is an apocalyptic number.

It is an amenable number.

348564509 is a deficient number, since it is larger than the sum of its proper divisors (1).

348564509 is an equidigital number, since it uses as much as digits as its factorization.

348564509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 348564509 is about 18669.8824045573. The cubic root of 348564509 is about 703.7650926455.

The spelling of 348564509 in words is "three hundred forty-eight million, five hundred sixty-four thousand, five hundred nine".