394908541 has 2 divisors, whose sum is σ = 394908542. Its totient is φ = 394908540.

The previous prime is 394908509. The next prime is 394908583. The reversal of 394908541 is 145809493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377719225 + 17189316 = 19435^2 + 4146^2 .

It is a cyclic number.

It is not a de Polignac number, because 394908541 - 2⁵ = 394908509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394908641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197454270 + 197454271.

It is an arithmetic number, because the mean of its divisors is an integer number (197454271).

Almost surely, 2^394908541 is an apocalyptic number.

It is an amenable number.

394908541 is a deficient number, since it is larger than the sum of its proper divisors (1).

394908541 is an equidigital number, since it uses as much as digits as its factorization.

394908541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 394908541 is about 19872.3058802948. The cubic root of 394908541 is about 733.6667585482. Note that the first 3 decimals are identical.

The spelling of 394908541 in words is "three hundred ninety-four million, nine hundred eight thousand, five hundred forty-one".