394666667253 has 24 divisors (see below), whose sum is σ = 603665022168. Its totient is φ = 247610529792.

The previous prime is 394666667249. The next prime is 394666667299. The reversal of 394666667253 is 352766666493.

It can be written as a sum of positive squares in 4 ways, for example, as 187334883684 + 207331783569 = 432822^2 + 455337^2 .

It is not a de Polignac number, because 394666667253 - 2² = 394666667249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394666667053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1575075 + ... + 1808367.

It is an arithmetic number, because the mean of its divisors is an integer number (25152709257).

Almost surely, 2^394666667253 is an apocalyptic number.

It is an amenable number.

394666667253 is a deficient number, since it is larger than the sum of its proper divisors (208998354915).

394666667253 is a wasteful number, since it uses less digits than its factorization.

394666667253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244373 (or 244370 counting only the distinct ones).

The product of its digits is 176359680, while the sum is 63.

The spelling of 394666667253 in words is "three hundred ninety-four billion, six hundred sixty-six million, six hundred sixty-seven thousand, two hundred fifty-three".