61730993 has 2 divisors, whose sum is σ = 61730994. Its totient is φ = 61730992.

The previous prime is 61730971. The next prime is 61731037. The reversal of 61730993 is 39903716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57638464 + 4092529 = 7592^2 + 2023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61730993 is a prime.

It is not a weakly prime, because it can be changed into another prime (61730093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30865496 + 30865497.

It is an arithmetic number, because the mean of its divisors is an integer number (30865497).

Almost surely, 2^61730993 is an apocalyptic number.

It is an amenable number.

61730993 is a deficient number, since it is larger than the sum of its proper divisors (1).

61730993 is an equidigital number, since it uses as much as digits as its factorization.

61730993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 61730993 is about 7856.9073432235. The cubic root of 61730993 is about 395.2159114413.

The spelling of 61730993 in words is "sixty-one million, seven hundred thirty thousand, nine hundred ninety-three".