394968533 has 2 divisors, whose sum is σ = 394968534. Its totient is φ = 394968532.

The previous prime is 394968521. The next prime is 394968547. The reversal of 394968533 is 335869493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261727684 + 133240849 = 16178^2 + 11543^2 .

It is a cyclic number.

It is not a de Polignac number, because 394968533 - 2²⁰ = 393919957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394968433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197484266 + 197484267.

It is an arithmetic number, because the mean of its divisors is an integer number (197484267).

Almost surely, 2^394968533 is an apocalyptic number.

It is an amenable number.

394968533 is a deficient number, since it is larger than the sum of its proper divisors (1).

394968533 is an equidigital number, since it uses as much as digits as its factorization.

394968533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 50.

The square root of 394968533 is about 19873.8152602866. The cubic root of 394968533 is about 733.7039080001.

The spelling of 394968533 in words is "three hundred ninety-four million, nine hundred sixty-eight thousand, five hundred thirty-three".