71993501 has 8 divisors (see below), whose sum is σ = 74534400. Its totient is φ = 69466320.

The previous prime is 71993491. The next prime is 71993513. The reversal of 71993501 is 10539917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71993501 - 2¹⁰ = 71992477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71993531) 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 7 ways as a sum of consecutive naturals, for example, 7895 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (9316800).

Almost surely, 2^71993501 is an apocalyptic number.

It is an amenable number.

71993501 is a deficient number, since it is larger than the sum of its proper divisors (2540899).

71993501 is a wasteful number, since it uses less digits than its factorization.

71993501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 71993501 is about 8484.8984083488. The cubic root of 71993501 is about 416.0042471367.

The spelling of 71993501 in words is "seventy-one million, nine hundred ninety-three thousand, five hundred one".