972856039 has 2 divisors, whose sum is σ = 972856040. Its totient is φ = 972856038.

The previous prime is 972856033. The next prime is 972856051. The reversal of 972856039 is 930658279.

It is a weak prime.

It is an emirp because it is prime and its reverse (930658279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 972856039 - 2¹⁷ = 972724967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 972855983 and 972856001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972856033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486428019 + 486428020.

It is an arithmetic number, because the mean of its divisors is an integer number (486428020).

Almost surely, 2^972856039 is an apocalyptic number.

972856039 is a deficient number, since it is larger than the sum of its proper divisors (1).

972856039 is an equidigital number, since it uses as much as digits as its factorization.

972856039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 972856039 is about 31190.6402467150. The cubic root of 972856039 is about 990.8688895982.

The spelling of 972856039 in words is "nine hundred seventy-two million, eight hundred fifty-six thousand, thirty-nine".