729049491 has 20 divisors (see below), whose sum is σ = 1106935104. Its totient is φ = 478062000.

The previous prime is 729049487. The next prime is 729049511. The reversal of 729049491 is 194940927.

It is a happy number.

729049491 is a `hidden beast` number, since 72 + 9 + 0 + 494 + 91 = 666.

It is not a de Polignac number, because 729049491 - 2² = 729049487 is a prime.

It is a super-3 number, since 3×729049491³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (729049421) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68835 + ... + 78716.

Almost surely, 2^729049491 is an apocalyptic number.

729049491 is a deficient number, since it is larger than the sum of its proper divisors (377885613).

729049491 is a wasteful number, since it uses less digits than its factorization.

729049491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147624 (or 147615 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 729049491 is about 27000.9164844455. The cubic root of 729049491 is about 900.0203662058.

The spelling of 729049491 in words is "seven hundred twenty-nine million, forty-nine thousand, four hundred ninety-one".