729801969 has 16 divisors (see below), whose sum is σ = 1081726464. Its totient is φ = 434620800.

The previous prime is 729801931. The next prime is 729801973. The reversal of 729801969 is 969108927.

It is a happy number.

It is not a de Polignac number, because 729801969 - 2⁷ = 729801841 is a prime.

It is a super-2 number, since 2×729801969² = 1065221827912553922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (729801929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300612 + ... + 303029.

It is an arithmetic number, because the mean of its divisors is an integer number (67607904).

Almost surely, 2^729801969 is an apocalyptic number.

It is an amenable number.

729801969 is a deficient number, since it is larger than the sum of its proper divisors (351924495).

729801969 is a wasteful number, since it uses less digits than its factorization.

729801969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603688.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 729801969 is about 27014.8471955701. The cubic root of 729801969 is about 900.3299074481.

The spelling of 729801969 in words is "seven hundred twenty-nine million, eight hundred one thousand, nine hundred sixty-nine".