71672815 has 8 divisors (see below), whose sum is σ = 86894640. Its totient is φ = 56746752.

The previous prime is 71672813. The next prime is 71672827. The reversal of 71672815 is 51827617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71672815 - 2¹ = 71672813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71672813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73405 + ... + 74374.

It is an arithmetic number, because the mean of its divisors is an integer number (10861830).

Almost surely, 2^71672815 is an apocalyptic number.

71672815 is a deficient number, since it is larger than the sum of its proper divisors (15221825).

71672815 is a wasteful number, since it uses less digits than its factorization.

71672815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147881.

The product of its digits is 23520, while the sum is 37.

The square root of 71672815 is about 8465.9798605950. The cubic root of 71672815 is about 415.3856481939.

The spelling of 71672815 in words is "seventy-one million, six hundred seventy-two thousand, eight hundred fifteen".