40566973 has 2 divisors, whose sum is σ = 40566974. Its totient is φ = 40566972.

The previous prime is 40566971. The next prime is 40567019. The reversal of 40566973 is 37966504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38601369 + 1965604 = 6213^2 + 1402^2 .

It is a cyclic number.

It is not a de Polignac number, because 40566973 - 2¹ = 40566971 is a prime.

It is a super-3 number, since 3×40566973³ (a number of 24 digits) contains 333 as substring.

Together with 40566971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40566971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283486 + 20283487.

It is an arithmetic number, because the mean of its divisors is an integer number (20283487).

Almost surely, 2^40566973 is an apocalyptic number.

It is an amenable number.

40566973 is a deficient number, since it is larger than the sum of its proper divisors (1).

40566973 is an equidigital number, since it uses as much as digits as its factorization.

40566973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 40566973 is about 6369.2207529650. The cubic root of 40566973 is about 343.6034646836.

The spelling of 40566973 in words is "forty million, five hundred sixty-six thousand, nine hundred seventy-three".