71887373 has 4 divisors (see below), whose sum is σ = 76116060. Its totient is φ = 67658688.

The previous prime is 71887367. The next prime is 71887421. The reversal of 71887373 is 37378817.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22915369 + 48972004 = 4787^2 + 6998^2 .

It is a cyclic number.

It is not a de Polignac number, because 71887373 - 2⁸ = 71887117 is a prime.

It is a super-2 number, since 2×71887373² = 10335588793682258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71887313) 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 3 ways as a sum of consecutive naturals, for example, 2114318 + ... + 2114351.

It is an arithmetic number, because the mean of its divisors is an integer number (19029015).

Almost surely, 2^71887373 is an apocalyptic number.

It is an amenable number.

71887373 is a deficient number, since it is larger than the sum of its proper divisors (4228687).

71887373 is a wasteful number, since it uses less digits than its factorization.

71887373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4228686.

The product of its digits is 197568, while the sum is 44.

The square root of 71887373 is about 8478.6421672341. The cubic root of 71887373 is about 415.7997314046.

The spelling of 71887373 in words is "seventy-one million, eight hundred eighty-seven thousand, three hundred seventy-three".