194415853 has 2 divisors, whose sum is σ = 194415854. Its totient is φ = 194415852.

The previous prime is 194415841. The next prime is 194415877. The reversal of 194415853 is 358514491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186104164 + 8311689 = 13642^2 + 2883^2 .

It is an emirp because it is prime and its reverse (358514491) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194415853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194415833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97207926 + 97207927.

It is an arithmetic number, because the mean of its divisors is an integer number (97207927).

Almost surely, 2^194415853 is an apocalyptic number.

It is an amenable number.

194415853 is a deficient number, since it is larger than the sum of its proper divisors (1).

194415853 is an equidigital number, since it uses as much as digits as its factorization.

194415853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 40.

The square root of 194415853 is about 13943.3085385069. The cubic root of 194415853 is about 579.3093771494.

The spelling of 194415853 in words is "one hundred ninety-four million, four hundred fifteen thousand, eight hundred fifty-three".