40564423 has 2 divisors, whose sum is σ = 40564424. Its totient is φ = 40564422.

The previous prime is 40564409. The next prime is 40564429. The reversal of 40564423 is 32446504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40564423 - 2⁹ = 40563911 is a prime.

It is equal to p_2465902 and since 40564423 and 2465902 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40564391 and 40564400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20282211 + 20282212.

It is an arithmetic number, because the mean of its divisors is an integer number (20282212).

Almost surely, 2^40564423 is an apocalyptic number.

40564423 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564423 is an equidigital number, since it uses as much as digits as its factorization.

40564423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 40564423 is about 6369.0205683449. The cubic root of 40564423 is about 343.5962650076.

The spelling of 40564423 in words is "forty million, five hundred sixty-four thousand, four hundred twenty-three".