1605513297 has 8 divisors (see below), whose sum is σ = 2142021280. Its totient is φ = 1069673760.

The previous prime is 1605513233. The next prime is 1605513323. The reversal of 1605513297 is 7923155061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1605513297 - 2⁶ = 1605513233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1605513197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161479 + ... + 171132.

It is an arithmetic number, because the mean of its divisors is an integer number (267752660).

Almost surely, 2^1605513297 is an apocalyptic number.

It is an amenable number.

1605513297 is a deficient number, since it is larger than the sum of its proper divisors (536507983).

1605513297 is a wasteful number, since it uses less digits than its factorization.

1605513297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334223.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 1605513297 is about 40068.8569465115. The cubic root of 1605513297 is about 1170.9489700332.

The spelling of 1605513297 in words is "one billion, six hundred five million, five hundred thirteen thousand, two hundred ninety-seven".