70872143 has 4 divisors (see below), whose sum is σ = 73316040. Its totient is φ = 68428248.

The previous prime is 70872121. The next prime is 70872161. The reversal of 70872143 is 34127807.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70872143 - 2⁶ = 70872079 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 (70872173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1221905 + ... + 1221962.

It is an arithmetic number, because the mean of its divisors is an integer number (18329010).

Almost surely, 2^70872143 is an apocalyptic number.

70872143 is a deficient number, since it is larger than the sum of its proper divisors (2443897).

70872143 is a wasteful number, since it uses less digits than its factorization.

70872143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443896.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 70872143 is about 8418.5594373384. The cubic root of 70872143 is about 413.8330657148.

The spelling of 70872143 in words is "seventy million, eight hundred seventy-two thousand, one hundred forty-three".