379639961 has 2 divisors, whose sum is σ = 379639962. Its totient is φ = 379639960.

The previous prime is 379639927. The next prime is 379639963. The reversal of 379639961 is 169936973.

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., 272910400 + 106729561 = 16520^2 + 10331^2 .

It is an emirp because it is prime and its reverse (169936973) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 379639961 - 2¹⁰ = 379638937 is a prime.

Together with 379639963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (379639963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189819980 + 189819981.

It is an arithmetic number, because the mean of its divisors is an integer number (189819981).

Almost surely, 2^379639961 is an apocalyptic number.

It is an amenable number.

379639961 is a deficient number, since it is larger than the sum of its proper divisors (1).

379639961 is an equidigital number, since it uses as much as digits as its factorization.

379639961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 53.

The square root of 379639961 is about 19484.3516956557. The cubic root of 379639961 is about 724.0868160242.

The spelling of 379639961 in words is "three hundred seventy-nine million, six hundred thirty-nine thousand, nine hundred sixty-one".