71673857 has 2 divisors, whose sum is σ = 71673858. Its totient is φ = 71673856.

The previous prime is 71673851. The next prime is 71673869. The reversal of 71673857 is 75837617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60357361 + 11316496 = 7769^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 71673857 - 2⁶ = 71673793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71673851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35836928 + 35836929.

It is an arithmetic number, because the mean of its divisors is an integer number (35836929).

Almost surely, 2^71673857 is an apocalyptic number.

It is an amenable number.

71673857 is a deficient number, since it is larger than the sum of its proper divisors (1).

71673857 is an equidigital number, since it uses as much as digits as its factorization.

71673857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 44.

The square root of 71673857 is about 8466.0414007965. The cubic root of 71673857 is about 415.3876611829.

The spelling of 71673857 in words is "seventy-one million, six hundred seventy-three thousand, eight hundred fifty-seven".