47975639 has 2 divisors, whose sum is σ = 47975640. Its totient is φ = 47975638.

The previous prime is 47975621. The next prime is 47975663. The reversal of 47975639 is 93657974.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47975639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47975689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23987819 + 23987820.

It is an arithmetic number, because the mean of its divisors is an integer number (23987820).

Almost surely, 2^47975639 is an apocalyptic number.

47975639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47975639 is an equidigital number, since it uses as much as digits as its factorization.

47975639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 50.

The square root of 47975639 is about 6926.4449034119. Note that the first 3 decimals coincide. The cubic root of 47975639 is about 363.3626263919.

The spelling of 47975639 in words is "forty-seven million, nine hundred seventy-five thousand, six hundred thirty-nine".