1955121359 has 2 divisors, whose sum is σ = 1955121360. Its totient is φ = 1955121358.

The previous prime is 1955121353. The next prime is 1955121373. The reversal of 1955121359 is 9531215591.

It is a weak prime.

It is an emirp because it is prime and its reverse (9531215591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955121359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955121353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977560679 + 977560680.

It is an arithmetic number, because the mean of its divisors is an integer number (977560680).

Almost surely, 2^1955121359 is an apocalyptic number.

1955121359 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955121359 is an equidigital number, since it uses as much as digits as its factorization.

1955121359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60750, while the sum is 41.

The square root of 1955121359 is about 44216.7542793453. The cubic root of 1955121359 is about 1250.4257448966.

The spelling of 1955121359 in words is "one billion, nine hundred fifty-five million, one hundred twenty-one thousand, three hundred fifty-nine".