40620647 has 2 divisors, whose sum is σ = 40620648. Its totient is φ = 40620646.

The previous prime is 40620623. The next prime is 40620673. The reversal of 40620647 is 74602604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40620647 - 2¹⁸ = 40358503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40620607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310323 + 20310324.

It is an arithmetic number, because the mean of its divisors is an integer number (20310324).

Almost surely, 2^40620647 is an apocalyptic number.

40620647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40620647 is an equidigital number, since it uses as much as digits as its factorization.

40620647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 40620647 is about 6373.4329054286. The cubic root of 40620647 is about 343.7549380227.

The spelling of 40620647 in words is "forty million, six hundred twenty thousand, six hundred forty-seven".