972972972973 has 4 divisors (see below), whose sum is σ = 977010205468. Its totient is φ = 968935740480.

The previous prime is 972972972953. The next prime is 972972973003. The reversal of 972972972973 is 379279279279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 379279279279 = 35983 ⋅10540513.

It can be written as a sum of positive squares in 2 ways, for example, as 582225463369 + 390747509604 = 763037^2 + 625098^2 .

It is a cyclic number.

It is not a de Polignac number, because 972972972973 - 2¹⁷ = 972972841901 is a prime.

It is a super-2 number, since 2×972972972973² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 972972972896 and 972972972905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972972972943) 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, 2018615886 + ... + 2018616367.

It is an arithmetic number, because the mean of its divisors is an integer number (244252551367).

Almost surely, 2^972972972973 is an apocalyptic number.

It is an amenable number.

972972972973 is a deficient number, since it is larger than the sum of its proper divisors (4037232495).

972972972973 is a wasteful number, since it uses less digits than its factorization.

972972972973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037232494.

The product of its digits is 378071064, while the sum is 73.

The spelling of 972972972973 in words is "nine hundred seventy-two billion, nine hundred seventy-two million, nine hundred seventy-two thousand, nine hundred seventy-three".