40978633 has 2 divisors, whose sum is σ = 40978634. Its totient is φ = 40978632.

The previous prime is 40978601. The next prime is 40978657. The reversal of 40978633 is 33687904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23068809 + 17909824 = 4803^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 40978633 - 2⁵ = 40978601 is a prime.

It is not a weakly prime, because it can be changed into another prime (40978673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20489316 + 20489317.

It is an arithmetic number, because the mean of its divisors is an integer number (20489317).

Almost surely, 2^40978633 is an apocalyptic number.

It is an amenable number.

40978633 is a deficient number, since it is larger than the sum of its proper divisors (1).

40978633 is an equidigital number, since it uses as much as digits as its factorization.

40978633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 40978633 is about 6401.4555376102. The cubic root of 40978633 is about 344.7618127696.

The spelling of 40978633 in words is "forty million, nine hundred seventy-eight thousand, six hundred thirty-three".