972231985 has 8 divisors (see below), whose sum is σ = 1170023400. Its totient is φ = 775555584.

The previous prime is 972231983. The next prime is 972232049. The reversal of 972231985 is 589132279.

It can be written as a sum of positive squares in 4 ways, for example, as 45212176 + 927019809 = 6724^2 + 30447^2 .

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 972231985 - 2¹ = 972231983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (972231983) 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, 276832 + ... + 280321.

It is an arithmetic number, because the mean of its divisors is an integer number (146252925).

Almost surely, 2^972231985 is an apocalyptic number.

It is an amenable number.

972231985 is a deficient number, since it is larger than the sum of its proper divisors (197791415).

972231985 is a wasteful number, since it uses less digits than its factorization.

972231985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557507.

The product of its digits is 272160, while the sum is 46.

The square root of 972231985 is about 31180.6347754500. The cubic root of 972231985 is about 990.6569747364.

The spelling of 972231985 in words is "nine hundred seventy-two million, two hundred thirty-one thousand, nine hundred eighty-five".