4002400123 has 2 divisors, whose sum is σ = 4002400124. Its totient is φ = 4002400122.

The previous prime is 4002400097. The next prime is 4002400133. The reversal of 4002400123 is 3210042004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002400123 - 2⁵ = 4002400091 is a prime.

It is a super-3 number, since 3×4002400123³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4002400097 and 4002400106.

It is not a weakly prime, because it can be changed into another prime (4002400133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001200061 + 2001200062.

It is an arithmetic number, because the mean of its divisors is an integer number (2001200062).

Almost surely, 2^4002400123 is an apocalyptic number.

4002400123 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002400123 is an equidigital number, since it uses as much as digits as its factorization.

4002400123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4002400123 is about 63264.5249962410. The cubic root of 4002400123 is about 1587.7184849681.

Adding to 4002400123 its reverse (3210042004), we get a palindrome (7212442127).

The spelling of 4002400123 in words is "four billion, two million, four hundred thousand, one hundred twenty-three".