403140023 has 16 divisors (see below), whose sum is σ = 501482016. Its totient is φ = 318397440.

The previous prime is 403140011. The next prime is 403140053. The reversal of 403140023 is 320041304.

It is a cyclic number.

It is not a de Polignac number, because 403140023 - 2⁶ = 403139959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403139983 and 403140010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403140053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80486 + ... + 85347.

It is an arithmetic number, because the mean of its divisors is an integer number (31342626).

Almost surely, 2^403140023 is an apocalyptic number.

403140023 is a deficient number, since it is larger than the sum of its proper divisors (98341993).

403140023 is a wasteful number, since it uses less digits than its factorization.

403140023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165874.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 403140023 is about 20078.3471182266. The cubic root of 403140023 is about 738.7292672760.

Adding to 403140023 its reverse (320041304), we get a palindrome (723181327).

The spelling of 403140023 in words is "four hundred three million, one hundred forty thousand, twenty-three".