71630001 has 10 divisors (see below), whose sum is σ = 107002962. Its totient is φ = 47753280.

The previous prime is 71629997. The next prime is 71630033. The reversal of 71630001 is 10003617.

It can be written as a sum of positive squares in only one way, i.e., 38452401 + 33177600 = 6201^2 + 5760^2 .

It is not a de Polignac number, because 71630001 - 2² = 71629997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71630081) 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 in 9 ways as a sum of consecutive naturals, for example, 442080 + ... + 442241.

Almost surely, 2^71630001 is an apocalyptic number.

It is an amenable number.

71630001 is a deficient number, since it is larger than the sum of its proper divisors (35372961).

71630001 is an equidigital number, since it uses as much as digits as its factorization.

71630001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884333 (or 884324 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 71630001 is about 8463.4508919235. The cubic root of 71630001 is about 415.3029210424.

Adding to 71630001 its reverse (10003617), we get a palindrome (81633618).

The spelling of 71630001 in words is "seventy-one million, six hundred thirty thousand, one".