971777965 has 32 divisors (see below), whose sum is σ = 1229230080. Its totient is φ = 736533504.

The previous prime is 971777957. The next prime is 971777977. The reversal of 971777965 is 569777179.

It is a cyclic number.

It is not a de Polignac number, because 971777965 - 2³ = 971777957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2080662 + ... + 2081128.

It is an arithmetic number, because the mean of its divisors is an integer number (38413440).

Almost surely, 2^971777965 is an apocalyptic number.

It is an amenable number.

971777965 is a deficient number, since it is larger than the sum of its proper divisors (257452115).

971777965 is a wasteful number, since it uses less digits than its factorization.

971777965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 5834430, while the sum is 58.

The square root of 971777965 is about 31173.3534448894. The cubic root of 971777965 is about 990.5027426470.

The spelling of 971777965 in words is "nine hundred seventy-one million, seven hundred seventy-seven thousand, nine hundred sixty-five".