403040023 has 2 divisors, whose sum is σ = 403040024. Its totient is φ = 403040022.

The previous prime is 403039997. The next prime is 403040039. The reversal of 403040023 is 320040304.

It is an a-pointer prime, because the next prime (403040039) can be obtained adding 403040023 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403040023 - 2⁵ = 403039991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403039979 and 403040006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403040423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201520011 + 201520012.

It is an arithmetic number, because the mean of its divisors is an integer number (201520012).

Almost surely, 2^403040023 is an apocalyptic number.

403040023 is a deficient number, since it is larger than the sum of its proper divisors (1).

403040023 is an equidigital number, since it uses as much as digits as its factorization.

403040023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 403040023 is about 20075.8567189547. The cubic root of 403040023 is about 738.6681809442.

Adding to 403040023 its reverse (320040304), we get a palindrome (723080327).

The spelling of 403040023 in words is "four hundred three million, forty thousand, twenty-three".