70720071 has 8 divisors (see below), whose sum is σ = 99256320. Its totient is φ = 44665272.

The previous prime is 70720057. The next prime is 70720087. The reversal of 70720071 is 17002707.

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

It is not a de Polignac number, because 70720071 - 2⁹ = 70719559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70720031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620295 + ... + 620408.

It is an arithmetic number, because the mean of its divisors is an integer number (12407040).

Almost surely, 2^70720071 is an apocalyptic number.

70720071 is a deficient number, since it is larger than the sum of its proper divisors (28536249).

70720071 is a wasteful number, since it uses less digits than its factorization.

70720071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240725.

The product of its (nonzero) digits is 686, while the sum is 24.

The square root of 70720071 is about 8409.5226380574. The cubic root of 70720071 is about 413.5368633571.

Adding to 70720071 its reverse (17002707), we get a palindrome (87722778).

The spelling of 70720071 in words is "seventy million, seven hundred twenty thousand, seventy-one".