823250642429 has 4 divisors (see below), whose sum is σ = 823465987776. Its totient is φ = 823035297084.

The previous prime is 823250642413. The next prime is 823250642503. The reversal of 823250642429 is 924246052328.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 823250642429 - 2⁴ = 823250642413 is a prime.

It is a super-2 number, since 2×823250642429² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823250642129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107666939 + ... + 107674584.

It is an arithmetic number, because the mean of its divisors is an integer number (205866496944).

Almost surely, 2^823250642429 is an apocalyptic number.

It is an amenable number.

823250642429 is a deficient number, since it is larger than the sum of its proper divisors (215345347).

823250642429 is a wasteful number, since it uses less digits than its factorization.

823250642429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215345346.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 823250642429 in words is "eight hundred twenty-three billion, two hundred fifty million, six hundred forty-two thousand, four hundred twenty-nine".