971713777 has 2 divisors, whose sum is σ = 971713778. Its totient is φ = 971713776.

The previous prime is 971713723. The next prime is 971713823. The reversal of 971713777 is 777317179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717757681 + 253956096 = 26791^2 + 15936^2 .

It is a cyclic number.

It is not a de Polignac number, because 971713777 - 2⁷ = 971713649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971713777.

It is not a weakly prime, because it can be changed into another prime (971713577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485856888 + 485856889.

It is an arithmetic number, because the mean of its divisors is an integer number (485856889).

Almost surely, 2^971713777 is an apocalyptic number.

It is an amenable number.

971713777 is a deficient number, since it is larger than the sum of its proper divisors (1).

971713777 is an equidigital number, since it uses as much as digits as its factorization.

971713777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453789, while the sum is 49.

The square root of 971713777 is about 31172.3238947628. The cubic root of 971713777 is about 990.4809338964.

The spelling of 971713777 in words is "nine hundred seventy-one million, seven hundred thirteen thousand, seven hundred seventy-seven".