9972005977 has 4 divisors (see below), whose sum is σ = 9972348880. Its totient is φ = 9971663076.

The previous prime is 9972005963. The next prime is 9972005983. The reversal of 9972005977 is 7795002799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9972005977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9972005947) 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, 123327 + ... + 187492.

It is an arithmetic number, because the mean of its divisors is an integer number (2493087220).

Almost surely, 2^9972005977 is an apocalyptic number.

It is an amenable number.

9972005977 is a deficient number, since it is larger than the sum of its proper divisors (342903).

9972005977 is a wasteful number, since it uses less digits than its factorization.

9972005977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342902.

The product of its (nonzero) digits is 2500470, while the sum is 55.

The square root of 9972005977 is about 99859.9317894820. The cubic root of 9972005977 is about 2152.4224346826.

The spelling of 9972005977 in words is "nine billion, nine hundred seventy-two million, five thousand, nine hundred seventy-seven".