40872647 has 2 divisors, whose sum is σ = 40872648. Its totient is φ = 40872646.

The previous prime is 40872583. The next prime is 40872653. The reversal of 40872647 is 74627804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40872647 - 2⁶ = 40872583 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40872647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40872677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20436323 + 20436324.

It is an arithmetic number, because the mean of its divisors is an integer number (20436324).

Almost surely, 2^40872647 is an apocalyptic number.

40872647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40872647 is an equidigital number, since it uses as much as digits as its factorization.

40872647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 40872647 is about 6393.1719044618. The cubic root of 40872647 is about 344.4643286898.

The spelling of 40872647 in words is "forty million, eight hundred seventy-two thousand, six hundred forty-seven".