729615973 has 2 divisors, whose sum is σ = 729615974. Its totient is φ = 729615972.

The previous prime is 729615917. The next prime is 729615977. The reversal of 729615973 is 379516927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443397249 + 286218724 = 21057^2 + 16918^2 .

It is an emirp because it is prime and its reverse (379516927) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729615973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729615977) 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, 364807986 + 364807987.

It is an arithmetic number, because the mean of its divisors is an integer number (364807987).

Almost surely, 2^729615973 is an apocalyptic number.

It is an amenable number.

729615973 is a deficient number, since it is larger than the sum of its proper divisors (1).

729615973 is an equidigital number, since it uses as much as digits as its factorization.

729615973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 714420, while the sum is 49.

The square root of 729615973 is about 27011.4044988409. The cubic root of 729615973 is about 900.2534154697.

The spelling of 729615973 in words is "seven hundred twenty-nine million, six hundred fifteen thousand, nine hundred seventy-three".