40918973 has 2 divisors, whose sum is σ = 40918974. Its totient is φ = 40918972.

The previous prime is 40918963. The next prime is 40918981. The reversal of 40918973 is 37981904.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21187609 + 19731364 = 4603^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 40918973 - 2⁴ = 40918957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40918973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40918963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20459486 + 20459487.

It is an arithmetic number, because the mean of its divisors is an integer number (20459487).

Almost surely, 2^40918973 is an apocalyptic number.

It is an amenable number.

40918973 is a deficient number, since it is larger than the sum of its proper divisors (1).

40918973 is an equidigital number, since it uses as much as digits as its factorization.

40918973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 40918973 is about 6396.7939626035. The cubic root of 40918973 is about 344.5944208218.

The spelling of 40918973 in words is "forty million, nine hundred eighteen thousand, nine hundred seventy-three".