72871847 has 2 divisors, whose sum is σ = 72871848. Its totient is φ = 72871846.

The previous prime is 72871829. The next prime is 72871853. The reversal of 72871847 is 74817827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72871847 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72871798 and 72871807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72871247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36435923 + 36435924.

It is an arithmetic number, because the mean of its divisors is an integer number (36435924).

Almost surely, 2^72871847 is an apocalyptic number.

72871847 is a deficient number, since it is larger than the sum of its proper divisors (1).

72871847 is an equidigital number, since it uses as much as digits as its factorization.

72871847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 175616, while the sum is 44.

The square root of 72871847 is about 8536.5008639372. The cubic root of 72871847 is about 417.6892125249.

The spelling of 72871847 in words is "seventy-two million, eight hundred seventy-one thousand, eight hundred forty-seven".