169858961 has 2 divisors, whose sum is σ = 169858962. Its totient is φ = 169858960.

The previous prime is 169858943. The next prime is 169858981.

169858961 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166900561 + 2958400 = 12919^2 + 1720^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 169858961 - 2²² = 165664657 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (169858921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84929480 + 84929481.

It is an arithmetic number, because the mean of its divisors is an integer number (84929481).

Almost surely, 2^169858961 is an apocalyptic number.

It is an amenable number.

169858961 is a deficient number, since it is larger than the sum of its proper divisors (1).

169858961 is an equidigital number, since it uses as much as digits as its factorization.

169858961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 53.

The square root of 169858961 is about 13032.9950893876. The cubic root of 169858961 is about 553.8125856698.

The spelling of 169858961 in words is "one hundred sixty-nine million, eight hundred fifty-eight thousand, nine hundred sixty-one".