773425981 has 2 divisors, whose sum is σ = 773425982. Its totient is φ = 773425980.

The previous prime is 773425973. The next prime is 773425997. The reversal of 773425981 is 189524377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 600740100 + 172685881 = 24510^2 + 13141^2 .

It is a cyclic number.

It is not a de Polignac number, because 773425981 - 2³ = 773425973 is a prime.

It is a super-2 number, since 2×773425981² = 1196375496171624722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (773425181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386712990 + 386712991.

It is an arithmetic number, because the mean of its divisors is an integer number (386712991).

Almost surely, 2^773425981 is an apocalyptic number.

It is an amenable number.

773425981 is a deficient number, since it is larger than the sum of its proper divisors (1).

773425981 is an equidigital number, since it uses as much as digits as its factorization.

773425981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 46.

The square root of 773425981 is about 27810.5372296186. The cubic root of 773425981 is about 917.9230007580.

The spelling of 773425981 in words is "seven hundred seventy-three million, four hundred twenty-five thousand, nine hundred eighty-one".