823952381 has 4 divisors (see below), whose sum is σ = 941659872. Its totient is φ = 706244892.

The previous prime is 823952357. The next prime is 823952401. The reversal of 823952381 is 183259328.

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 823952381 - 2¹⁰ = 823951357 is a prime.

It is a super-2 number, since 2×823952381² = 1357795052311138322, which 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 (823952341) 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, 58853735 + ... + 58853748.

It is an arithmetic number, because the mean of its divisors is an integer number (235414968).

Almost surely, 2^823952381 is an apocalyptic number.

It is an amenable number.

823952381 is a deficient number, since it is larger than the sum of its proper divisors (117707491).

823952381 is a wasteful number, since it uses less digits than its factorization.

823952381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117707490.

The product of its digits is 103680, while the sum is 41.

The square root of 823952381 is about 28704.5707335957. The cubic root of 823952381 is about 937.4915696072.

The spelling of 823952381 in words is "eight hundred twenty-three million, nine hundred fifty-two thousand, three hundred eighty-one".