40289647 has 2 divisors, whose sum is σ = 40289648. Its totient is φ = 40289646.

The previous prime is 40289621. The next prime is 40289653. The reversal of 40289647 is 74698204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40289647 - 2¹⁹ = 39765359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40289617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20144823 + 20144824.

It is an arithmetic number, because the mean of its divisors is an integer number (20144824).

Almost surely, 2^40289647 is an apocalyptic number.

40289647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40289647 is an equidigital number, since it uses as much as digits as its factorization.

40289647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 40289647 is about 6347.4126224785. The cubic root of 40289647 is about 342.8186871634.

The spelling of 40289647 in words is "forty million, two hundred eighty-nine thousand, six hundred forty-seven".