71672239 has 2 divisors, whose sum is σ = 71672240. Its totient is φ = 71672238.

The previous prime is 71672231. The next prime is 71672257. The reversal of 71672239 is 93227617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71672239 - 2³ = 71672231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71672198 and 71672207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71672231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35836119 + 35836120.

It is an arithmetic number, because the mean of its divisors is an integer number (35836120).

Almost surely, 2^71672239 is an apocalyptic number.

71672239 is a deficient number, since it is larger than the sum of its proper divisors (1).

71672239 is an equidigital number, since it uses as much as digits as its factorization.

71672239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 71672239 is about 8465.9458420191. The cubic root of 71672239 is about 415.3845354393.

The spelling of 71672239 in words is "seventy-one million, six hundred seventy-two thousand, two hundred thirty-nine".