39965047 has 2 divisors, whose sum is σ = 39965048. Its totient is φ = 39965046.

The previous prime is 39965027. The next prime is 39965071. The reversal of 39965047 is 74056993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39965047 - 2⁷ = 39964919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39964994 and 39965012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39965027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19982523 + 19982524.

It is an arithmetic number, because the mean of its divisors is an integer number (19982524).

Almost surely, 2^39965047 is an apocalyptic number.

39965047 is a deficient number, since it is larger than the sum of its proper divisors (1).

39965047 is an equidigital number, since it uses as much as digits as its factorization.

39965047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 39965047 is about 6321.7914391413. The cubic root of 39965047 is about 341.8955456572.

The spelling of 39965047 in words is "thirty-nine million, nine hundred sixty-five thousand, forty-seven".