401243623 has 18 divisors (see below), whose sum is σ = 456884792. Its totient is φ = 352099440.

The previous prime is 401243617. The next prime is 401243629. The reversal of 401243623 is 326342104.

It is an interprime number because it is at equal distance from previous prime (401243617) and next prime (401243629).

It is not a de Polignac number, because 401243623 - 2⁹ = 401243111 is a prime.

It is a super-2 number, since 2×401243623² = 321992889996332258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401243629) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 99790 + ... + 103732.

Almost surely, 2^401243623 is an apocalyptic number.

401243623 is a deficient number, since it is larger than the sum of its proper divisors (55641169).

401243623 is a wasteful number, since it uses less digits than its factorization.

401243623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023 (or 3983 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 401243623 is about 20031.0664468969. The cubic root of 401243623 is about 737.5691007934.

Adding to 401243623 its reverse (326342104), we get a palindrome (727585727).

The spelling of 401243623 in words is "four hundred one million, two hundred forty-three thousand, six hundred twenty-three".