61004437 has 6 divisors (see below), whose sum is σ = 66058242. Its totient is φ = 56311632.

The previous prime is 61004369. The next prime is 61004467. The reversal of 61004437 is 73440016.

It can be written as a sum of positive squares in 3 ways, for example, as 4844401 + 56160036 = 2201^2 + 7494^2 .

It is not a de Polignac number, because 61004437 - 2⁷ = 61004309 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 5 ways as a sum of consecutive naturals, for example, 180318 + ... + 180655.

It is an arithmetic number, because the mean of its divisors is an integer number (11009707).

Almost surely, 2^61004437 is an apocalyptic number.

It is an amenable number.

61004437 is a deficient number, since it is larger than the sum of its proper divisors (5053805).

61004437 is a wasteful number, since it uses less digits than its factorization.

61004437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360999 (or 360986 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 61004437 is about 7810.5337205597. The cubic root of 61004437 is about 393.6592624712.

The spelling of 61004437 in words is "sixty-one million, four thousand, four hundred thirty-seven".