972111143 has 4 divisors (see below), whose sum is σ = 985427808. Its totient is φ = 958794480.

The previous prime is 972111137. The next prime is 972111167. The reversal of 972111143 is 341111279.

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 972111143 - 2¹⁰ = 972110119 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 (972111043) 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, 6658223 + ... + 6658368.

It is an arithmetic number, because the mean of its divisors is an integer number (246356952).

Almost surely, 2^972111143 is an apocalyptic number.

972111143 is a deficient number, since it is larger than the sum of its proper divisors (13316665).

972111143 is a wasteful number, since it uses less digits than its factorization.

972111143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13316664.

The product of its digits is 1512, while the sum is 29.

The square root of 972111143 is about 31178.6969419827. The cubic root of 972111143 is about 990.6159290011.

The spelling of 972111143 in words is "nine hundred seventy-two million, one hundred eleven thousand, one hundred forty-three".