40769647 has 2 divisors, whose sum is σ = 40769648. Its totient is φ = 40769646.

The previous prime is 40769629. The next prime is 40769657. The reversal of 40769647 is 74696704.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40769647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40769657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20384823 + 20384824.

It is an arithmetic number, because the mean of its divisors is an integer number (20384824).

Almost surely, 2^40769647 is an apocalyptic number.

40769647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40769647 is an equidigital number, since it uses as much as digits as its factorization.

40769647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 40769647 is about 6385.1113537667. Note that the first 3 decimals coincide. The cubic root of 40769647 is about 344.1747326431.

The spelling of 40769647 in words is "forty million, seven hundred sixty-nine thousand, six hundred forty-seven".