40117423 has 2 divisors, whose sum is σ = 40117424. Its totient is φ = 40117422.

The previous prime is 40117421. The next prime is 40117447. The reversal of 40117423 is 32471104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40117423 - 2¹ = 40117421 is a prime.

Together with 40117421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40117394 and 40117403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40117421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20058711 + 20058712.

It is an arithmetic number, because the mean of its divisors is an integer number (20058712).

Almost surely, 2^40117423 is an apocalyptic number.

40117423 is a deficient number, since it is larger than the sum of its proper divisors (1).

40117423 is an equidigital number, since it uses as much as digits as its factorization.

40117423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 40117423 is about 6333.8316207490. The cubic root of 40117423 is about 342.3295132468.

Adding to 40117423 its reverse (32471104), we get a palindrome (72588527).

The spelling of 40117423 in words is "forty million, one hundred seventeen thousand, four hundred twenty-three".