16532993 has 8 divisors (see below), whose sum is σ = 17680680. Its totient is φ = 15404800.

The previous prime is 16532953. The next prime is 16533029. The reversal of 16532993 is 39923561.

It can be written as a sum of positive squares in 4 ways, for example, as 14077504 + 2455489 = 3752^2 + 1567^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16532993 - 2¹⁰ = 16531969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16532903) 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, 3098 + ... + 6531.

It is an arithmetic number, because the mean of its divisors is an integer number (2210085).

Almost surely, 2^16532993 is an apocalyptic number.

It is an amenable number.

16532993 is a deficient number, since it is larger than the sum of its proper divisors (1147687).

16532993 is a wasteful number, since it uses less digits than its factorization.

16532993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747.

The product of its digits is 43740, while the sum is 38.

The square root of 16532993 is about 4066.0783317590. The cubic root of 16532993 is about 254.7517409529.

The spelling of 16532993 in words is "sixteen million, five hundred thirty-two thousand, nine hundred ninety-three".