400246123 has 2 divisors, whose sum is σ = 400246124. Its totient is φ = 400246122.

The previous prime is 400246117. The next prime is 400246127. The reversal of 400246123 is 321642004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400246123 is a prime.

It is a super-2 number, since 2×400246123² = 320393917953062258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400246094 and 400246103.

It is not a weakly prime, because it can be changed into another prime (400246127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200123061 + 200123062.

It is an arithmetic number, because the mean of its divisors is an integer number (200123062).

Almost surely, 2^400246123 is an apocalyptic number.

400246123 is a deficient number, since it is larger than the sum of its proper divisors (1).

400246123 is an equidigital number, since it uses as much as digits as its factorization.

400246123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 400246123 is about 20006.1521287828. The cubic root of 400246123 is about 736.9573895575.

Adding to 400246123 its reverse (321642004), we get a palindrome (721888127).

The spelling of 400246123 in words is "four hundred million, two hundred forty-six thousand, one hundred twenty-three".