71630915 has 4 divisors (see below), whose sum is σ = 85957104. Its totient is φ = 57304728.

The previous prime is 71630891. The next prime is 71630941. The reversal of 71630915 is 51903617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71630915 - 2⁶ = 71630851 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7163087 + ... + 7163096.

It is an arithmetic number, because the mean of its divisors is an integer number (21489276).

Almost surely, 2^71630915 is an apocalyptic number.

71630915 is a deficient number, since it is larger than the sum of its proper divisors (14326189).

71630915 is a wasteful number, since it uses less digits than its factorization.

71630915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14326188.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 71630915 is about 8463.5048886380. The cubic root of 71630915 is about 415.3046874589.

The spelling of 71630915 in words is "seventy-one million, six hundred thirty thousand, nine hundred fifteen".