823745029 has 4 divisors (see below), whose sum is σ = 852150060. Its totient is φ = 795340000.

The previous prime is 823745017. The next prime is 823745033. The reversal of 823745029 is 920547328.

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

It can be written as a sum of positive squares in 2 ways, for example, as 682776900 + 140968129 = 26130^2 + 11873^2 .

It is a cyclic number.

It is not a de Polignac number, because 823745029 - 2¹⁵ = 823712261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 823744982 and 823745000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823745009) 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, 14202472 + ... + 14202529.

It is an arithmetic number, because the mean of its divisors is an integer number (213037515).

Almost surely, 2^823745029 is an apocalyptic number.

It is an amenable number.

823745029 is a deficient number, since it is larger than the sum of its proper divisors (28405031).

823745029 is a wasteful number, since it uses less digits than its factorization.

823745029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28405030.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 823745029 is about 28700.9586773683. The cubic root of 823745029 is about 937.4129214291.

The spelling of 823745029 in words is "eight hundred twenty-three million, seven hundred forty-five thousand, twenty-nine".