16570949 has 4 divisors (see below), whose sum is σ = 16731936. Its totient is φ = 16409964.

The previous prime is 16570921. The next prime is 16570951. The reversal of 16570949 is 94907561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16570949 - 2⁸ = 16570693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16570979) 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, 80339 + ... + 80544.

It is an arithmetic number, because the mean of its divisors is an integer number (4182984).

Almost surely, 2^16570949 is an apocalyptic number.

It is an amenable number.

16570949 is a deficient number, since it is larger than the sum of its proper divisors (160987).

16570949 is a wasteful number, since it uses less digits than its factorization.

16570949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160986.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 16570949 is about 4070.7430525642. The cubic root of 16570949 is about 254.9465426837.

The spelling of 16570949 in words is "sixteen million, five hundred seventy thousand, nine hundred forty-nine".