40342823 has 2 divisors, whose sum is σ = 40342824. Its totient is φ = 40342822.

The previous prime is 40342789. The next prime is 40342849. The reversal of 40342823 is 32824304.

It is an a-pointer prime, because the next prime (40342849) can be obtained adding 40342823 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40342823 - 2¹⁴ = 40326439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40342792 and 40342801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40342123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20171411 + 20171412.

It is an arithmetic number, because the mean of its divisors is an integer number (20171412).

Almost surely, 2^40342823 is an apocalyptic number.

40342823 is a deficient number, since it is larger than the sum of its proper divisors (1).

40342823 is an equidigital number, since it uses as much as digits as its factorization.

40342823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40342823 is about 6351.6000346369. The cubic root of 40342823 is about 342.9694431153.

The spelling of 40342823 in words is "forty million, three hundred forty-two thousand, eight hundred twenty-three".