349536509 has 16 divisors (see below), whose sum is σ = 410116608. Its totient is φ = 291685632.

The previous prime is 349536491. The next prime is 349536529. The reversal of 349536509 is 905635943.

It is a de Polignac number, because none of the positive numbers 2^k-349536509 is a prime.

It is a super-2 number, since 2×349536509² = 244351542247814162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 349536509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349536529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62117 + ... + 67509.

It is an arithmetic number, because the mean of its divisors is an integer number (25632288).

Almost surely, 2^349536509 is an apocalyptic number.

It is an amenable number.

349536509 is a deficient number, since it is larger than the sum of its proper divisors (60580099).

349536509 is a wasteful number, since it uses less digits than its factorization.

349536509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644.

The product of its (nonzero) digits is 437400, while the sum is 44.

The square root of 349536509 is about 18695.8955121171. The cubic root of 349536509 is about 704.4186539270.

It can be divided in two parts, 3495 and 36509, that added together give a palindrome (40004).

The spelling of 349536509 in words is "three hundred forty-nine million, five hundred thirty-six thousand, five hundred nine".