61609669 has 8 divisors (see below), whose sum is σ = 68774112. Its totient is φ = 54705840.

The previous prime is 61609657. The next prime is 61609673. The reversal of 61609669 is 96690616.

61609669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61609669 - 2¹⁵ = 61576901 is a prime.

It is a super-2 number, since 2×61609669² = 7591502628579122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61609619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64654 + ... + 65599.

It is an arithmetic number, because the mean of its divisors is an integer number (8596764).

Almost surely, 2^61609669 is an apocalyptic number.

It is an amenable number.

61609669 is a deficient number, since it is larger than the sum of its proper divisors (7164443).

61609669 is a wasteful number, since it uses less digits than its factorization.

61609669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130307.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 61609669 is about 7849.1826963067. The cubic root of 61609669 is about 394.9568269857.

The spelling of 61609669 in words is "sixty-one million, six hundred nine thousand, six hundred sixty-nine".