729978367 has 4 divisors (see below), whose sum is σ = 733646800. Its totient is φ = 726309936.

The previous prime is 729978349. The next prime is 729978371. The reversal of 729978367 is 763879927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 729978367 - 2¹¹ = 729976319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729978307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833918 + ... + 1834315.

It is an arithmetic number, because the mean of its divisors is an integer number (183411700).

Almost surely, 2^729978367 is an apocalyptic number.

729978367 is a deficient number, since it is larger than the sum of its proper divisors (3668433).

729978367 is a wasteful number, since it uses less digits than its factorization.

729978367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668432.

The product of its digits is 8001504, while the sum is 58.

The square root of 729978367 is about 27018.1118326207. Note that the first 3 decimals coincide. The cubic root of 729978367 is about 900.4024401843.

The spelling of 729978367 in words is "seven hundred twenty-nine million, nine hundred seventy-eight thousand, three hundred sixty-seven".