71423937 has 20 divisors (see below), whose sum is σ = 114904020. Its totient is φ = 43952544.

The previous prime is 71423921. The next prime is 71423981. The reversal of 71423937 is 73932417.

It can be written as a sum of positive squares in 2 ways, for example, as 29550096 + 41873841 = 5436^2 + 6471^2 .

It is not a de Polignac number, because 71423937 - 2⁴ = 71423921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71423917) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 32862 + ... + 34967.

It is an arithmetic number, because the mean of its divisors is an integer number (5745201).

Almost surely, 2^71423937 is an apocalyptic number.

It is an amenable number.

71423937 is a deficient number, since it is larger than the sum of its proper divisors (43480083).

71423937 is a wasteful number, since it uses less digits than its factorization.

71423937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67854 (or 67845 counting only the distinct ones).

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

The square root of 71423937 is about 8451.2683663460. The cubic root of 71423937 is about 414.9042930215.

The spelling of 71423937 in words is "seventy-one million, four hundred twenty-three thousand, nine hundred thirty-seven".