71985007 has 8 divisors (see below), whose sum is σ = 74466432. Its totient is φ = 69513600.

The previous prime is 71984981. The next prime is 71985049. The reversal of 71985007 is 70058917.

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 71985007 - 2¹⁵ = 71952239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71985097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13923 + ... + 18379.

It is an arithmetic number, because the mean of its divisors is an integer number (9308304).

Almost surely, 2^71985007 is an apocalyptic number.

71985007 is a deficient number, since it is larger than the sum of its proper divisors (2481425).

71985007 is a wasteful number, since it uses less digits than its factorization.

71985007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 71985007 is about 8484.3978572436. The cubic root of 71985007 is about 415.9878860347.

The spelling of 71985007 in words is "seventy-one million, nine hundred eighty-five thousand, seven".