401129823 has 16 divisors (see below), whose sum is σ = 541516640. Its totient is φ = 264093696.

The previous prime is 401129809. The next prime is 401129837. The reversal of 401129823 is 328921104.

It is an interprime number because it is at equal distance from previous prime (401129809) and next prime (401129837).

It is not a de Polignac number, because 401129823 - 2⁵ = 401129791 is a prime.

It is a super-2 number, since 2×401129823² = 321810269800022658, 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 (401129803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166713 + ... + 169101.

It is an arithmetic number, because the mean of its divisors is an integer number (33844790).

Almost surely, 2^401129823 is an apocalyptic number.

401129823 is a deficient number, since it is larger than the sum of its proper divisors (140386817).

401129823 is a wasteful number, since it uses less digits than its factorization.

401129823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 401129823 is about 20028.2256578060. The cubic root of 401129823 is about 737.4993648563.

The spelling of 401129823 in words is "four hundred one million, one hundred twenty-nine thousand, eight hundred twenty-three".