61820393 has 2 divisors, whose sum is σ = 61820394. Its totient is φ = 61820392.

The previous prime is 61820387. The next prime is 61820399. The reversal of 61820393 is 39302816.

It is a balanced prime because it is at equal distance from previous prime (61820387) and next prime (61820399).

It can be written as a sum of positive squares in only one way, i.e., 49168144 + 12652249 = 7012^2 + 3557^2 .

It is a cyclic number.

It is not a de Polignac number, because 61820393 - 2⁶ = 61820329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61820399) 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, 30910196 + 30910197.

It is an arithmetic number, because the mean of its divisors is an integer number (30910197).

Almost surely, 2^61820393 is an apocalyptic number.

It is an amenable number.

61820393 is a deficient number, since it is larger than the sum of its proper divisors (1).

61820393 is an equidigital number, since it uses as much as digits as its factorization.

61820393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 61820393 is about 7862.5945463314. The cubic root of 61820393 is about 395.4066058190.

The spelling of 61820393 in words is "sixty-one million, eight hundred twenty thousand, three hundred ninety-three".