16961619 has 16 divisors (see below), whose sum is σ = 23465984. Its totient is φ = 10886400.

The previous prime is 16961611. The next prime is 16961621. The reversal of 16961619 is 91616961.

It is not a de Polignac number, because 16961619 - 2³ = 16961611 is a prime.

It is a super-2 number, since 2×16961619² = 575393038202322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16961611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24867 + ... + 25539.

It is an arithmetic number, because the mean of its divisors is an integer number (1466624).

Almost surely, 2^16961619 is an apocalyptic number.

16961619 is a deficient number, since it is larger than the sum of its proper divisors (6504365).

16961619 is a wasteful number, since it uses less digits than its factorization.

16961619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 17496, while the sum is 39.

The square root of 16961619 is about 4118.4486156804. The cubic root of 16961619 is about 256.9345066702.

The spelling of 16961619 in words is "sixteen million, nine hundred sixty-one thousand, six hundred nineteen".