400875523 has 4 divisors (see below), whose sum is σ = 404423208. Its totient is φ = 397327840.

The previous prime is 400875499. The next prime is 400875551. The reversal of 400875523 is 325578004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400875523 - 2²¹ = 398778371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400872523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773673 + ... + 1773898.

It is an arithmetic number, because the mean of its divisors is an integer number (101105802).

Almost surely, 2^400875523 is an apocalyptic number.

400875523 is a deficient number, since it is larger than the sum of its proper divisors (3547685).

400875523 is a wasteful number, since it uses less digits than its factorization.

400875523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547684.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 400875523 is about 20021.8761108943. The cubic root of 400875523 is about 737.3434837060.

The spelling of 400875523 in words is "four hundred million, eight hundred seventy-five thousand, five hundred twenty-three".