71630387 has 2 divisors, whose sum is σ = 71630388. Its totient is φ = 71630386.

The previous prime is 71630371. The next prime is 71630431. The reversal of 71630387 is 78303617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71630387 - 2⁴ = 71630371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71630347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815193 + 35815194.

It is an arithmetic number, because the mean of its divisors is an integer number (35815194).

Almost surely, 2^71630387 is an apocalyptic number.

71630387 is a deficient number, since it is larger than the sum of its proper divisors (1).

71630387 is an equidigital number, since it uses as much as digits as its factorization.

71630387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 71630387 is about 8463.4736958296. The cubic root of 71630387 is about 415.3036670363.

The spelling of 71630387 in words is "seventy-one million, six hundred thirty thousand, three hundred eighty-seven".