773777993 has 2 divisors, whose sum is σ = 773777994. Its totient is φ = 773777992.

The previous prime is 773777981. The next prime is 773778007. The reversal of 773777993 is 399777377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575616064 + 198161929 = 23992^2 + 14077^2 .

It is an emirp because it is prime and its reverse (399777377) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-773777993 is a prime.

It is a super-2 number, since 2×773777993² = 1197464764902216098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (773777393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386888996 + 386888997.

It is an arithmetic number, because the mean of its divisors is an integer number (386888997).

Almost surely, 2^773777993 is an apocalyptic number.

It is an amenable number.

773777993 is a deficient number, since it is larger than the sum of its proper divisors (1).

773777993 is an equidigital number, since it uses as much as digits as its factorization.

773777993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12252303, while the sum is 59.

The square root of 773777993 is about 27816.8652619234. The cubic root of 773777993 is about 918.0622387764.

The spelling of 773777993 in words is "seven hundred seventy-three million, seven hundred seventy-seven thousand, nine hundred ninety-three".