40724647 has 2 divisors, whose sum is σ = 40724648. Its totient is φ = 40724646.

The previous prime is 40724633. The next prime is 40724659. The reversal of 40724647 is 74642704.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40724647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40724147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20362323 + 20362324.

It is an arithmetic number, because the mean of its divisors is an integer number (20362324).

Almost surely, 2^40724647 is an apocalyptic number.

40724647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40724647 is an equidigital number, since it uses as much as digits as its factorization.

40724647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 40724647 is about 6381.5865582158. The cubic root of 40724647 is about 344.0480569917.

The spelling of 40724647 in words is "forty million, seven hundred twenty-four thousand, six hundred forty-seven".