71241993 has 6 divisors (see below), whose sum is σ = 102905114. Its totient is φ = 47494656.

The previous prime is 71241979. The next prime is 71242037. The reversal of 71241993 is 39914217.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 480249 = 8412^2 + 693^2 .

It is not a de Polignac number, because 71241993 - 2⁴ = 71241977 is a prime.

It is a super-2 number, since 2×71241993² = 10150843133224098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71241913) 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 5 ways as a sum of consecutive naturals, for example, 3957880 + ... + 3957897.

Almost surely, 2^71241993 is an apocalyptic number.

It is an amenable number.

71241993 is a deficient number, since it is larger than the sum of its proper divisors (31663121).

71241993 is a wasteful number, since it uses less digits than its factorization.

71241993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7915783 (or 7915780 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 71241993 is about 8440.4972009947. The cubic root of 71241993 is about 414.5516869682.

It can be divided in two parts, 71 and 241993, that added together give a square (242064 = 492²).

The spelling of 71241993 in words is "seventy-one million, two hundred forty-one thousand, nine hundred ninety-three".