71900047 has 8 divisors (see below), whose sum is σ = 78975360. Its totient is φ = 65153880.

The previous prime is 71899973. The next prime is 71900051. The reversal of 71900047 is 74000917.

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 71900047 - 2¹¹ = 71897999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71899988 and 71900024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71900747) 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 7 ways as a sum of consecutive naturals, for example, 81829 + ... + 82702.

It is an arithmetic number, because the mean of its divisors is an integer number (9871920).

Almost surely, 2^71900047 is an apocalyptic number.

71900047 is a deficient number, since it is larger than the sum of its proper divisors (7075313).

71900047 is a wasteful number, since it uses less digits than its factorization.

71900047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164573.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 71900047 is about 8479.3895417064. The cubic root of 71900047 is about 415.8241656268.

The spelling of 71900047 in words is "seventy-one million, nine hundred thousand, forty-seven".