61804689 has 8 divisors (see below), whose sum is σ = 84633600. Its totient is φ = 40089456.

The previous prime is 61804681. The next prime is 61804697. The reversal of 61804689 is 98640816.

It is an interprime number because it is at equal distance from previous prime (61804681) and next prime (61804697).

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

It is not a de Polignac number, because 61804689 - 2³ = 61804681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61804689.

It is not an unprimeable number, because it can be changed into a prime (61804681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278289 + ... + 278510.

It is an arithmetic number, because the mean of its divisors is an integer number (10579200).

Almost surely, 2^61804689 is an apocalyptic number.

It is an amenable number.

61804689 is a deficient number, since it is larger than the sum of its proper divisors (22828911).

61804689 is a wasteful number, since it uses less digits than its factorization.

61804689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556839.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 61804689 is about 7861.5958303642. The cubic root of 61804689 is about 395.3731217701.

The spelling of 61804689 in words is "sixty-one million, eight hundred four thousand, six hundred eighty-nine".