71121937 has 4 divisors (see below), whose sum is σ = 71786736. Its totient is φ = 70457140.

The previous prime is 71121901. The next prime is 71121961. The reversal of 71121937 is 73912117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71121937 - 2¹¹ = 71119889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71121899 and 71121908.

It is not an unprimeable number, because it can be changed into a prime (71122937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332239 + ... + 332452.

It is an arithmetic number, because the mean of its divisors is an integer number (17946684).

Almost surely, 2^71121937 is an apocalyptic number.

It is an amenable number.

71121937 is a deficient number, since it is larger than the sum of its proper divisors (664799).

71121937 is a wasteful number, since it uses less digits than its factorization.

71121937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664798.

The product of its digits is 2646, while the sum is 31.

The square root of 71121937 is about 8433.3822989356. The cubic root of 71121937 is about 414.3186904899.

The spelling of 71121937 in words is "seventy-one million, one hundred twenty-one thousand, nine hundred thirty-seven".