61023709 has 2 divisors, whose sum is σ = 61023710. Its totient is φ = 61023708.

The previous prime is 61023707. The next prime is 61023731. The reversal of 61023709 is 90732016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60886809 + 136900 = 7803^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 61023709 - 2¹ = 61023707 is a prime.

Together with 61023707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61023701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30511854 + 30511855.

It is an arithmetic number, because the mean of its divisors is an integer number (30511855).

Almost surely, 2^61023709 is an apocalyptic number.

It is an amenable number.

61023709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61023709 is an equidigital number, since it uses as much as digits as its factorization.

61023709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 61023709 is about 7811.7673416456. The cubic root of 61023709 is about 393.7007119292.

The spelling of 61023709 in words is "sixty-one million, twenty-three thousand, seven hundred nine".