972877777 has 4 divisors (see below), whose sum is σ = 984599280. Its totient is φ = 961156276.

The previous prime is 972877771. The next prime is 972877793. The reversal of 972877777 is 777778279.

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-972877777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (972877771) 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, 5860627 + ... + 5860792.

It is an arithmetic number, because the mean of its divisors is an integer number (246149820).

Almost surely, 2^972877777 is an apocalyptic number.

It is an amenable number.

972877777 is a deficient number, since it is larger than the sum of its proper divisors (11721503).

972877777 is a wasteful number, since it uses less digits than its factorization.

972877777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721502.

The product of its digits is 16941456, while the sum is 61.

The square root of 972877777 is about 31190.9887146913. The cubic root of 972877777 is about 990.8762697061.

The spelling of 972877777 in words is "nine hundred seventy-two million, eight hundred seventy-seven thousand, seven hundred seventy-seven".