16309961 has 8 divisors (see below), whose sum is σ = 17217600. Its totient is φ = 15407280.

The previous prime is 16309939. The next prime is 16309973. The reversal of 16309961 is 16990361.

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 16309961 - 2⁶ = 16309897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16309361) 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, 6980 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (2152200).

Almost surely, 2^16309961 is an apocalyptic number.

It is an amenable number.

16309961 is a deficient number, since it is larger than the sum of its proper divisors (907639).

16309961 is a wasteful number, since it uses less digits than its factorization.

16309961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 16309961 is about 4038.5592728100. The cubic root of 16309961 is about 253.6010072787.

The spelling of 16309961 in words is "sixteen million, three hundred nine thousand, nine hundred sixty-one".