61044989 has 2 divisors, whose sum is σ = 61044990. Its totient is φ = 61044988.

The previous prime is 61044979. The next prime is 61045003. The reversal of 61044989 is 98944016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32604100 + 28440889 = 5710^2 + 5333^2 .

It is a cyclic number.

It is not a de Polignac number, because 61044989 - 2¹² = 61040893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61044979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30522494 + 30522495.

It is an arithmetic number, because the mean of its divisors is an integer number (30522495).

Almost surely, 2^61044989 is an apocalyptic number.

It is an amenable number.

61044989 is a deficient number, since it is larger than the sum of its proper divisors (1).

61044989 is an equidigital number, since it uses as much as digits as its factorization.

61044989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 61044989 is about 7813.1292706572. The cubic root of 61044989 is about 393.7464699776.

The spelling of 61044989 in words is "sixty-one million, forty-four thousand, nine hundred eighty-nine".