16329961 has 4 divisors (see below), whose sum is σ = 16606800. Its totient is φ = 16053124.

The previous prime is 16329959. The next prime is 16329967. The reversal of 16329961 is 16992361.

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 16329961 - 2¹ = 16329959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16329961.

It is not an unprimeable number, because it can be changed into a prime (16329967) 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, 138331 + ... + 138448.

It is an arithmetic number, because the mean of its divisors is an integer number (4151700).

Almost surely, 2^16329961 is an apocalyptic number.

It is an amenable number.

16329961 is a deficient number, since it is larger than the sum of its proper divisors (276839).

16329961 is an equidigital number, since it uses as much as digits as its factorization.

16329961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276838.

The product of its digits is 17496, while the sum is 37.

The square root of 16329961 is about 4041.0346447414. The cubic root of 16329961 is about 253.7046238841.

The spelling of 16329961 in words is "sixteen million, three hundred twenty-nine thousand, nine hundred sixty-one".