729320387 has 2 divisors, whose sum is σ = 729320388. Its totient is φ = 729320386.

The previous prime is 729320381. The next prime is 729320401. The reversal of 729320387 is 783023927.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729320387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (729320381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364660193 + 364660194.

It is an arithmetic number, because the mean of its divisors is an integer number (364660194).

Almost surely, 2^729320387 is an apocalyptic number.

729320387 is a deficient number, since it is larger than the sum of its proper divisors (1).

729320387 is an equidigital number, since it uses as much as digits as its factorization.

729320387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 729320387 is about 27005.9324408545. The cubic root of 729320387 is about 900.1318271918.

The spelling of 729320387 in words is "seven hundred twenty-nine million, three hundred twenty thousand, three hundred eighty-seven".