9972976477 has 4 divisors (see below), whose sum is σ = 10061233020. Its totient is φ = 9884719936.

The previous prime is 9972976457. The next prime is 9972976501. The reversal of 9972976477 is 7746792799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7746792799 = 83 ⋅93334853.

It can be written as a sum of positive squares in 2 ways, for example, as 4252474521 + 5720501956 = 65211^2 + 75634^2 .

It is a cyclic number.

It is not a de Polignac number, because 9972976477 - 2¹⁵ = 9972943709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972976457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44128102 + ... + 44128327.

It is an arithmetic number, because the mean of its divisors is an integer number (2515308255).

Almost surely, 2^9972976477 is an apocalyptic number.

It is an amenable number.

9972976477 is a deficient number, since it is larger than the sum of its proper divisors (88256543).

9972976477 is a wasteful number, since it uses less digits than its factorization.

9972976477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88256542.

The product of its digits is 84015792, while the sum is 67.

The square root of 9972976477 is about 99864.7909776013. The cubic root of 9972976477 is about 2152.4922587552.

The spelling of 9972976477 in words is "nine billion, nine hundred seventy-two million, nine hundred seventy-six thousand, four hundred seventy-seven".