396766541 has 2 divisors, whose sum is σ = 396766542. Its totient is φ = 396766540.

The previous prime is 396766523. The next prime is 396766571. The reversal of 396766541 is 145667693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228312100 + 168454441 = 15110^2 + 12979^2 .

It is an emirp because it is prime and its reverse (145667693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396766541 - 2¹⁴ = 396750157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396766501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198383270 + 198383271.

It is an arithmetic number, because the mean of its divisors is an integer number (198383271).

Almost surely, 2^396766541 is an apocalyptic number.

It is an amenable number.

396766541 is a deficient number, since it is larger than the sum of its proper divisors (1).

396766541 is an equidigital number, since it uses as much as digits as its factorization.

396766541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 396766541 is about 19918.9994979668. Note that the first 3 decimals coincide. The cubic root of 396766541 is about 734.8155651198.

The spelling of 396766541 in words is "three hundred ninety-six million, seven hundred sixty-six thousand, five hundred forty-one".