394194961 has 2 divisors, whose sum is σ = 394194962. Its totient is φ = 394194960.

The previous prime is 394194877. The next prime is 394194991. The reversal of 394194961 is 169491493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381811600 + 12383361 = 19540^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 394194961 - 2²³ = 385806353 is a prime.

It is not a weakly prime, because it can be changed into another prime (394194991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197097480 + 197097481.

It is an arithmetic number, because the mean of its divisors is an integer number (197097481).

Almost surely, 2^394194961 is an apocalyptic number.

It is an amenable number.

394194961 is a deficient number, since it is larger than the sum of its proper divisors (1).

394194961 is an equidigital number, since it uses as much as digits as its factorization.

394194961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 394194961 is about 19854.3436305510. The cubic root of 394194961 is about 733.2245923933.

The spelling of 394194961 in words is "three hundred ninety-four million, one hundred ninety-four thousand, nine hundred sixty-one".