396581077 has 2 divisors, whose sum is σ = 396581078. Its totient is φ = 396581076.

The previous prime is 396581023. The next prime is 396581099. The reversal of 396581077 is 770185693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252364996 + 144216081 = 15886^2 + 12009^2 .

It is a cyclic number.

It is not a de Polignac number, because 396581077 - 2¹⁵ = 396548309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396581477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198290538 + 198290539.

It is an arithmetic number, because the mean of its divisors is an integer number (198290539).

Almost surely, 2^396581077 is an apocalyptic number.

It is an amenable number.

396581077 is a deficient number, since it is larger than the sum of its proper divisors (1).

396581077 is an equidigital number, since it uses as much as digits as its factorization.

396581077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 396581077 is about 19914.3434990963. The cubic root of 396581077 is about 734.7010535537.

The spelling of 396581077 in words is "three hundred ninety-six million, five hundred eighty-one thousand, seventy-seven".