401630123 has 2 divisors, whose sum is σ = 401630124. Its totient is φ = 401630122.

The previous prime is 401630107. The next prime is 401630129. The reversal of 401630123 is 321036104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401630123 - 2⁴ = 401630107 is a prime.

It is a super-2 number, since 2×401630123² = 322613511401990258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 401630095 and 401630104.

It is not a weakly prime, because it can be changed into another prime (401630129) 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 as a sum of consecutive naturals, namely, 200815061 + 200815062.

It is an arithmetic number, because the mean of its divisors is an integer number (200815062).

Almost surely, 2^401630123 is an apocalyptic number.

401630123 is a deficient number, since it is larger than the sum of its proper divisors (1).

401630123 is an equidigital number, since it uses as much as digits as its factorization.

401630123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 401630123 is about 20040.7116390611. The cubic root of 401630123 is about 737.8058472139.

Adding to 401630123 its reverse (321036104), we get a palindrome (722666227).

The spelling of 401630123 in words is "four hundred one million, six hundred thirty thousand, one hundred twenty-three".