380644853 has 2 divisors, whose sum is σ = 380644854. Its totient is φ = 380644852.

The previous prime is 380644837. The next prime is 380644867. The reversal of 380644853 is 358446083.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267584164 + 113060689 = 16358^2 + 10633^2 .

It is an emirp because it is prime and its reverse (358446083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380644853 - 2⁴ = 380644837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 380644853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380644883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190322426 + 190322427.

It is an arithmetic number, because the mean of its divisors is an integer number (190322427).

Almost surely, 2^380644853 is an apocalyptic number.

It is an amenable number.

380644853 is a deficient number, since it is larger than the sum of its proper divisors (1).

380644853 is an equidigital number, since it uses as much as digits as its factorization.

380644853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 380644853 is about 19510.1218089483. The cubic root of 380644853 is about 724.7251295704.

The spelling of 380644853 in words is "three hundred eighty million, six hundred forty-four thousand, eight hundred fifty-three".