397774787171 has 2 divisors, whose sum is σ = 397774787172. Its totient is φ = 397774787170.

The previous prime is 397774787153. The next prime is 397774787183. The reversal of 397774787171 is 171787477793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397774787171 - 2¹⁴ = 397774770787 is a prime.

It is not a weakly prime, because it can be changed into another prime (397774787141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198887393585 + 198887393586.

It is an arithmetic number, because the mean of its divisors is an integer number (198887393586).

Almost surely, 2^397774787171 is an apocalyptic number.

397774787171 is a deficient number, since it is larger than the sum of its proper divisors (1).

397774787171 is an equidigital number, since it uses as much as digits as its factorization.

397774787171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101648736, while the sum is 68.

The spelling of 397774787171 in words is "three hundred ninety-seven billion, seven hundred seventy-four million, seven hundred eighty-seven thousand, one hundred seventy-one".