40143238123 has 2 divisors, whose sum is σ = 40143238124. Its totient is φ = 40143238122.

The previous prime is 40143238087. The next prime is 40143238151. The reversal of 40143238123 is 32183234104.

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-40143238123 is a prime.

It is a super-2 number, since 2×40143238123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40143238523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071619061 + 20071619062.

It is an arithmetic number, because the mean of its divisors is an integer number (20071619062).

Almost surely, 2^40143238123 is an apocalyptic number.

40143238123 is a deficient number, since it is larger than the sum of its proper divisors (1).

40143238123 is an equidigital number, since it uses as much as digits as its factorization.

40143238123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 40143238123 in words is "forty billion, one hundred forty-three million, two hundred thirty-eight thousand, one hundred twenty-three".