729978349 has 2 divisors, whose sum is σ = 729978350. Its totient is φ = 729978348.

The previous prime is 729978331. The next prime is 729978371. The reversal of 729978349 is 943879927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548402724 + 181575625 = 23418^2 + 13475^2 .

It is a cyclic number.

It is not a de Polignac number, because 729978349 - 2⁹ = 729977837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 729978293 and 729978302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729978649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364989174 + 364989175.

It is an arithmetic number, because the mean of its divisors is an integer number (364989175).

Almost surely, 2^729978349 is an apocalyptic number.

It is an amenable number.

729978349 is a deficient number, since it is larger than the sum of its proper divisors (1).

729978349 is an equidigital number, since it uses as much as digits as its factorization.

729978349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 58.

The square root of 729978349 is about 27018.1114995108. Note that the first 3 decimals coincide. The cubic root of 729978349 is about 900.4024327836.

The spelling of 729978349 in words is "seven hundred twenty-nine million, nine hundred seventy-eight thousand, three hundred forty-nine".