169400961 has 12 divisors (see below), whose sum is σ = 245361792. Its totient is φ = 112624056.

The previous prime is 169400927. The next prime is 169400983. The reversal of 169400961 is 169004961.

169400961 is a `hidden beast` number, since 169 + 400 + 96 + 1 = 666.

It is not a de Polignac number, because 169400961 - 2⁹ = 169400449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (169300961) 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 11 ways as a sum of consecutive naturals, for example, 22341 + ... + 28946.

It is an arithmetic number, because the mean of its divisors is an integer number (20446816).

Almost surely, 2^169400961 is an apocalyptic number.

It is an amenable number.

169400961 is a deficient number, since it is larger than the sum of its proper divisors (75960831).

169400961 is a wasteful number, since it uses less digits than its factorization.

169400961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51660 (or 51657 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 169400961 is about 13015.4124406413. The cubic root of 169400961 is about 553.3143792398.

The spelling of 169400961 in words is "one hundred sixty-nine million, four hundred thousand, nine hundred sixty-one".