394575229 has 2 divisors, whose sum is σ = 394575230. Its totient is φ = 394575228.

The previous prime is 394575211. The next prime is 394575257. The reversal of 394575229 is 922575493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251222500 + 143352729 = 15850^2 + 11973^2 .

It is a cyclic number.

It is not a de Polignac number, because 394575229 - 2⁵ = 394575197 is a prime.

It is a super-2 number, since 2×394575229² = 311379222680804882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394575029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197287614 + 197287615.

It is an arithmetic number, because the mean of its divisors is an integer number (197287615).

Almost surely, 2^394575229 is an apocalyptic number.

It is an amenable number.

394575229 is a deficient number, since it is larger than the sum of its proper divisors (1).

394575229 is an equidigital number, since it uses as much as digits as its factorization.

394575229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 394575229 is about 19863.9177656373. The cubic root of 394575229 is about 733.4602898425.

The spelling of 394575229 in words is "three hundred ninety-four million, five hundred seventy-five thousand, two hundred twenty-nine".