972708389 has 2 divisors, whose sum is σ = 972708390. Its totient is φ = 972708388.

The previous prime is 972708377. The next prime is 972708403. The reversal of 972708389 is 983807279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620508100 + 352200289 = 24910^2 + 18767^2 .

It is a cyclic number.

It is not a de Polignac number, because 972708389 - 2²⁰ = 971659813 is a prime.

It is a super-2 number, since 2×972708389² = 1892323220061950642, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 972708389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972708089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486354194 + 486354195.

It is an arithmetic number, because the mean of its divisors is an integer number (486354195).

Almost surely, 2^972708389 is an apocalyptic number.

It is an amenable number.

972708389 is a deficient number, since it is larger than the sum of its proper divisors (1).

972708389 is an equidigital number, since it uses as much as digits as its factorization.

972708389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 972708389 is about 31188.2732609550. The cubic root of 972708389 is about 990.8187591275.

The spelling of 972708389 in words is "nine hundred seventy-two million, seven hundred eight thousand, three hundred eighty-nine".