16961969 has 4 divisors (see below), whose sum is σ = 17249520. Its totient is φ = 16674420.

The previous prime is 16961957. The next prime is 16961999. The reversal of 16961969 is 96916961.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96916961 = 47 ⋅2062063.

It is a cyclic number.

It is not a de Polignac number, because 16961969 - 2⁴ = 16961953 is a prime.

It is a super-2 number, since 2×16961969² = 575416784713922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16961999) 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, 143687 + ... + 143804.

It is an arithmetic number, because the mean of its divisors is an integer number (4312380).

Almost surely, 2^16961969 is an apocalyptic number.

It is an amenable number.

16961969 is a deficient number, since it is larger than the sum of its proper divisors (287551).

16961969 is an equidigital number, since it uses as much as digits as its factorization.

16961969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287550.

The product of its digits is 157464, while the sum is 47.

The square root of 16961969 is about 4118.4911071896. The cubic root of 16961969 is about 256.9362739240.

The spelling of 16961969 in words is "sixteen million, nine hundred sixty-one thousand, nine hundred sixty-nine".