61000039 has 2 divisors, whose sum is σ = 61000040. Its totient is φ = 61000038.

The previous prime is 61000003. The next prime is 61000091. The reversal of 61000039 is 93000016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61000039 - 2¹⁵ = 60967271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500019 + 30500020.

It is an arithmetic number, because the mean of its divisors is an integer number (30500020).

Almost surely, 2^61000039 is an apocalyptic number.

61000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000039 is an equidigital number, since it uses as much as digits as its factorization.

61000039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 61000039 is about 7810.2521726254. The cubic root of 61000039 is about 393.6498022028.

The spelling of 61000039 in words is "sixty-one million, thirty-nine", and thus it is an aban number and an uban number.