396269981 has 2 divisors, whose sum is σ = 396269982. Its totient is φ = 396269980.

The previous prime is 396269977. The next prime is 396269989. The reversal of 396269981 is 189962693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246207481 + 150062500 = 15691^2 + 12250^2 .

It is a cyclic number.

It is not a de Polignac number, because 396269981 - 2² = 396269977 is a prime.

It is a super-2 number, since 2×396269981² = 314059795683480722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396269989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198134990 + 198134991.

It is an arithmetic number, because the mean of its divisors is an integer number (198134991).

Almost surely, 2^396269981 is an apocalyptic number.

It is an amenable number.

396269981 is a deficient number, since it is larger than the sum of its proper divisors (1).

396269981 is an equidigital number, since it uses as much as digits as its factorization.

396269981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 53.

The square root of 396269981 is about 19906.5311141846. The cubic root of 396269981 is about 734.5088924689.

The spelling of 396269981 in words is "three hundred ninety-six million, two hundred sixty-nine thousand, nine hundred eighty-one".