961936777 has 2 divisors, whose sum is σ = 961936778. Its totient is φ = 961936776.

The previous prime is 961936763. The next prime is 961936783. The reversal of 961936777 is 777639169.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698069241 + 263867536 = 26421^2 + 16244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961936777 is a prime.

It is not a weakly prime, because it can be changed into another prime (961934777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480968388 + 480968389.

It is an arithmetic number, because the mean of its divisors is an integer number (480968389).

Almost surely, 2^961936777 is an apocalyptic number.

It is an amenable number.

961936777 is a deficient number, since it is larger than the sum of its proper divisors (1).

961936777 is an equidigital number, since it uses as much as digits as its factorization.

961936777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000564, while the sum is 55.

The square root of 961936777 is about 31015.1056261300. The cubic root of 961936777 is about 987.1477872680.

The spelling of 961936777 in words is "nine hundred sixty-one million, nine hundred thirty-six thousand, seven hundred seventy-seven".