972231986 has 16 divisors (see below), whose sum is σ = 1611066240. Its totient is φ = 436328880.

The previous prime is 972231983. The next prime is 972232049. The reversal of 972231986 is 689132279.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 972231986.

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, 277961 + ... + 281436.

It is an arithmetic number, because the mean of its divisors is an integer number (100691640).

Almost surely, 2^972231986 is an apocalyptic number.

972231986 is a deficient number, since it is larger than the sum of its proper divisors (638834254).

972231986 is a wasteful number, since it uses less digits than its factorization.

972231986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559489.

The product of its digits is 326592, while the sum is 47.

The square root of 972231986 is about 31180.6347914856. The cubic root of 972231986 is about 990.6569750761.

The spelling of 972231986 in words is "nine hundred seventy-two million, two hundred thirty-one thousand, nine hundred eighty-six".