61606169 has 4 divisors (see below), whose sum is σ = 62348496. Its totient is φ = 60863844.

The previous prime is 61606163. The next prime is 61606201. The reversal of 61606169 is 96160616.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61606169 is a prime.

It is a super-2 number, since 2×61606169² = 7590640117713122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61606163) 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 3 ways as a sum of consecutive naturals, for example, 371039 + ... + 371204.

It is an arithmetic number, because the mean of its divisors is an integer number (15587124).

Almost surely, 2^61606169 is an apocalyptic number.

It is an amenable number.

61606169 is a deficient number, since it is larger than the sum of its proper divisors (742327).

61606169 is an equidigital number, since it uses as much as digits as its factorization.

61606169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742326.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 61606169 is about 7848.9597399910. The cubic root of 61606169 is about 394.9493477751.

The spelling of 61606169 in words is "sixty-one million, six hundred six thousand, one hundred sixty-nine".