816729741 has 12 divisors (see below), whose sum is σ = 1179995232. Its totient is φ = 544359816.

The previous prime is 816729737. The next prime is 816729769. The reversal of 816729741 is 147927618.

It is a happy number.

816729741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816729741 - 2² = 816729737 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816729721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46510 + ... + 61616.

It is an arithmetic number, because the mean of its divisors is an integer number (98332936).

Almost surely, 2^816729741 is an apocalyptic number.

It is an amenable number.

816729741 is a deficient number, since it is larger than the sum of its proper divisors (363265491).

816729741 is a wasteful number, since it uses less digits than its factorization.

816729741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21120 (or 21117 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 816729741 is about 28578.4838821096. The cubic root of 816729741 is about 934.7442239354.

The spelling of 816729741 in words is "eight hundred sixteen million, seven hundred twenty-nine thousand, seven hundred forty-one".