61083989 has 2 divisors, whose sum is σ = 61083990. Its totient is φ = 61083988.

The previous prime is 61083983. The next prime is 61084007. The reversal of 61083989 is 98938016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 28536964 = 5705^2 + 5342^2 .

It is a cyclic number.

It is not a de Polignac number, because 61083989 - 2¹⁶ = 61018453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61083983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30541994 + 30541995.

It is an arithmetic number, because the mean of its divisors is an integer number (30541995).

Almost surely, 2^61083989 is an apocalyptic number.

It is an amenable number.

61083989 is a deficient number, since it is larger than the sum of its proper divisors (1).

61083989 is an equidigital number, since it uses as much as digits as its factorization.

61083989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 61083989 is about 7815.6246711315. The cubic root of 61083989 is about 393.8303034668.

The spelling of 61083989 in words is "sixty-one million, eighty-three thousand, nine hundred eighty-nine".