39995947 has 2 divisors, whose sum is σ = 39995948. Its totient is φ = 39995946.

The previous prime is 39995941. The next prime is 39995953. The reversal of 39995947 is 74959993.

It is a balanced prime because it is at equal distance from previous prime (39995941) and next prime (39995953).

It is a cyclic number.

It is not a de Polignac number, because 39995947 - 2¹⁵ = 39963179 is a prime.

It is not a weakly prime, because it can be changed into another prime (39995941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19997973 + 19997974.

It is an arithmetic number, because the mean of its divisors is an integer number (19997974).

Almost surely, 2^39995947 is an apocalyptic number.

39995947 is a deficient number, since it is larger than the sum of its proper divisors (1).

39995947 is an equidigital number, since it uses as much as digits as its factorization.

39995947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 55.

The square root of 39995947 is about 6324.2348944358. The cubic root of 39995947 is about 341.9836380577.

The spelling of 39995947 in words is "thirty-nine million, nine hundred ninety-five thousand, nine hundred forty-seven".