169949961 has 16 divisors (see below), whose sum is σ = 257920320. Its totient is φ = 110535840.

The previous prime is 169949957. The next prime is 169949963.

169949961 is a `hidden beast` number, since 1 + 6 + 99 + 499 + 61 = 666.

169949961 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 169949961 - 2² = 169949957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 169949898 and 169949907.

It is not an unprimeable number, because it can be changed into a prime (169949963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75655 + ... + 77868.

It is an arithmetic number, because the mean of its divisors is an integer number (16120020).

Almost surely, 2^169949961 is an apocalyptic number.

It is an amenable number.

169949961 is a deficient number, since it is larger than the sum of its proper divisors (87970359).

169949961 is a wasteful number, since it uses less digits than its factorization.

169949961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153573 (or 153567 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 169949961 is about 13036.4857611244. The cubic root of 169949961 is about 553.9114676046.

The spelling of 169949961 in words is "one hundred sixty-nine million, nine hundred forty-nine thousand, nine hundred sixty-one".