61004447 has 4 divisors (see below), whose sum is σ = 69719376. Its totient is φ = 52289520.

The previous prime is 61004369. The next prime is 61004467. The reversal of 61004447 is 74440016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61004447 - 2⁸ = 61004191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61004467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4357454 + ... + 4357467.

It is an arithmetic number, because the mean of its divisors is an integer number (17429844).

Almost surely, 2^61004447 is an apocalyptic number.

61004447 is a deficient number, since it is larger than the sum of its proper divisors (8714929).

61004447 is an equidigital number, since it uses as much as digits as its factorization.

61004447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8714928.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 61004447 is about 7810.5343607208. The cubic root of 61004447 is about 393.6592839810.

The spelling of 61004447 in words is "sixty-one million, four thousand, four hundred forty-seven".