169591061 has 2 divisors, whose sum is σ = 169591062. Its totient is φ = 169591060.

The previous prime is 169591033. The next prime is 169591063. The reversal of 169591061 is 160195961.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159542161 + 10048900 = 12631^2 + 3170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169591061 is a prime.

It is a super-2 number, since 2×169591061² = 57522255942211442, which contains 22 as substring.

Together with 169591063, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9481574 and since 169591061 and 9481574 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169591063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84795530 + 84795531.

It is an arithmetic number, because the mean of its divisors is an integer number (84795531).

Almost surely, 2^169591061 is an apocalyptic number.

It is an amenable number.

169591061 is a deficient number, since it is larger than the sum of its proper divisors (1).

169591061 is an equidigital number, since it uses as much as digits as its factorization.

169591061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 169591061 is about 13022.7132733544. The cubic root of 169591061 is about 553.5212764174.

The spelling of 169591061 in words is "one hundred sixty-nine million, five hundred ninety-one thousand, sixty-one".