39847470973 has 2 divisors, whose sum is σ = 39847470974. Its totient is φ = 39847470972.

The previous prime is 39847470941. The next prime is 39847470983. The reversal of 39847470973 is 37907474893.

39847470973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37255948324 + 2591522649 = 193018^2 + 50907^2 .

It is a cyclic number.

It is not a de Polignac number, because 39847470973 - 2⁵ = 39847470941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39847470983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19923735486 + 19923735487.

It is an arithmetic number, because the mean of its divisors is an integer number (19923735487).

Almost surely, 2^39847470973 is an apocalyptic number.

It is an amenable number.

39847470973 is a deficient number, since it is larger than the sum of its proper divisors (1).

39847470973 is an equidigital number, since it uses as much as digits as its factorization.

39847470973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32006016, while the sum is 61.

The spelling of 39847470973 in words is "thirty-nine billion, eight hundred forty-seven million, four hundred seventy thousand, nine hundred seventy-three".