401355623 has 4 divisors (see below), whose sum is σ = 403155648. Its totient is φ = 399555600.

The previous prime is 401355599. The next prime is 401355637. The reversal of 401355623 is 326553104.

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 401355623 - 2¹² = 401351527 is a prime.

It is a super-2 number, since 2×401355623² = 322172672227436258, 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 (401355653) 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, 899678 + ... + 900123.

It is an arithmetic number, because the mean of its divisors is an integer number (100788912).

Almost surely, 2^401355623 is an apocalyptic number.

401355623 is a deficient number, since it is larger than the sum of its proper divisors (1800025).

401355623 is a wasteful number, since it uses less digits than its factorization.

401355623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800024.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 401355623 is about 20033.8619092775. The cubic root of 401355623 is about 737.6377208283.

The spelling of 401355623 in words is "four hundred one million, three hundred fifty-five thousand, six hundred twenty-three".