71638027 has 2 divisors, whose sum is σ = 71638028. Its totient is φ = 71638026.

The previous prime is 71638009. The next prime is 71638057. The reversal of 71638027 is 72083617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71638027 - 2⁷ = 71637899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71637983 and 71638001.

It is not a weakly prime, because it can be changed into another prime (71638057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35819013 + 35819014.

It is an arithmetic number, because the mean of its divisors is an integer number (35819014).

Almost surely, 2^71638027 is an apocalyptic number.

71638027 is a deficient number, since it is larger than the sum of its proper divisors (1).

71638027 is an equidigital number, since it uses as much as digits as its factorization.

71638027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 71638027 is about 8463.9250351123. The cubic root of 71638027 is about 415.3184317535.

The spelling of 71638027 in words is "seventy-one million, six hundred thirty-eight thousand, twenty-seven".