1955279 has 2 divisors, whose sum is σ = 1955280. Its totient is φ = 1955278.

The previous prime is 1955251. The next prime is 1955281. The reversal of 1955279 is 9725591.

It is a strong prime.

It is an emirp because it is prime and its reverse (9725591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1955279 - 2¹⁶ = 1889743 is a prime.

It is a Sophie Germain prime.

Together with 1955281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977639 + 977640.

It is an arithmetic number, because the mean of its divisors is an integer number (977640).

2^1955279 is an apocalyptic number.

1955279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955279 is an equidigital number, since it uses as much as digits as its factorization.

1955279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 1955279 is about 1398.3129120479. The cubic root of 1955279 is about 125.0459351177.

The spelling of 1955279 in words is "one million, nine hundred fifty-five thousand, two hundred seventy-nine".