349297521 has 16 divisors (see below), whose sum is σ = 493533504. Its totient is φ = 218985984.

The previous prime is 349297519. The next prime is 349297549. The reversal of 349297521 is 125792943.

It is not a de Polignac number, because 349297521 - 2¹ = 349297519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (349297621) 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, 87450 + ... + 91356.

It is an arithmetic number, because the mean of its divisors is an integer number (30845844).

Almost surely, 2^349297521 is an apocalyptic number.

It is an amenable number.

349297521 is a deficient number, since it is larger than the sum of its proper divisors (144235983).

349297521 is a wasteful number, since it uses less digits than its factorization.

349297521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5680.

The product of its digits is 136080, while the sum is 42.

The square root of 349297521 is about 18689.5029628934. The cubic root of 349297521 is about 704.2580736695.

The spelling of 349297521 in words is "three hundred forty-nine million, two hundred ninety-seven thousand, five hundred twenty-one".