40972279 has 2 divisors, whose sum is σ = 40972280. Its totient is φ = 40972278.

The previous prime is 40972277. The next prime is 40972403. The reversal of 40972279 is 97227904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40972279 - 2¹ = 40972277 is a prime.

Together with 40972277, 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 (40972277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20486139 + 20486140.

It is an arithmetic number, because the mean of its divisors is an integer number (20486140).

Almost surely, 2^40972279 is an apocalyptic number.

40972279 is a deficient number, since it is larger than the sum of its proper divisors (1).

40972279 is an equidigital number, since it uses as much as digits as its factorization.

40972279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 40972279 is about 6400.9592249912. The cubic root of 40972279 is about 344.7439926714.

The spelling of 40972279 in words is "forty million, nine hundred seventy-two thousand, two hundred seventy-nine".