71473239 has 8 divisors (see below), whose sum is σ = 105886320. Its totient is φ = 47648808.

The previous prime is 71473217. The next prime is 71473243. The reversal of 71473239 is 93237417.

It is not a de Polignac number, because 71473239 - 2¹³ = 71465047 is a prime.

It is a super-2 number, since 2×71473239² = 10216847786302242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71472239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323552 + ... + 1323605.

It is an arithmetic number, because the mean of its divisors is an integer number (13235790).

Almost surely, 2^71473239 is an apocalyptic number.

71473239 is a deficient number, since it is larger than the sum of its proper divisors (34413081).

71473239 is a wasteful number, since it uses less digits than its factorization.

71473239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647166 (or 2647160 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 71473239 is about 8454.1847034472. The cubic root of 71473239 is about 414.9997367783. Note that the first 3 decimals are identical.

The spelling of 71473239 in words is "seventy-one million, four hundred seventy-three thousand, two hundred thirty-nine".