71837842 has 4 divisors (see below), whose sum is σ = 107756766. Its totient is φ = 35918920.

The previous prime is 71837839. The next prime is 71837873. The reversal of 71837842 is 24873817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24873817 = 67 ⋅371251.

It can be written as a sum of positive squares in only one way, i.e., 56385081 + 15452761 = 7509^2 + 3931^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 71837795 and 71837804.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17959459 + ... + 17959462.

Almost surely, 2^71837842 is an apocalyptic number.

71837842 is a deficient number, since it is larger than the sum of its proper divisors (35918924).

71837842 is a wasteful number, since it uses less digits than its factorization.

71837842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35918923.

The product of its digits is 75264, while the sum is 40.

The square root of 71837842 is about 8475.7207363150. The cubic root of 71837842 is about 415.7042129684.

The spelling of 71837842 in words is "seventy-one million, eight hundred thirty-seven thousand, eight hundred forty-two".