1642379279 has 2 divisors, whose sum is σ = 1642379280. Its totient is φ = 1642379278.

The previous prime is 1642379267. The next prime is 1642379329. The reversal of 1642379279 is 9729732461.

It is an a-pointer prime, because the next prime (1642379329) can be obtained adding 1642379279 to its sum of digits (50).

It is a weak prime.

It is an emirp because it is prime and its reverse (9729732461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642379279 - 2²⁴ = 1625602063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642376279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821189639 + 821189640.

It is an arithmetic number, because the mean of its divisors is an integer number (821189640).

Almost surely, 2^1642379279 is an apocalyptic number.

1642379279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642379279 is an equidigital number, since it uses as much as digits as its factorization.

1642379279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 1642379279 is about 40526.2788693953. The cubic root of 1642379279 is about 1179.8437212837.

The spelling of 1642379279 in words is "one billion, six hundred forty-two million, three hundred seventy-nine thousand, two hundred seventy-nine".