1955658659 has 2 divisors, whose sum is σ = 1955658660. Its totient is φ = 1955658658.

The previous prime is 1955658641. The next prime is 1955658721. The reversal of 1955658659 is 9568565591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1955658659 - 2⁸ = 1955658403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1955658598 and 1955658607.

It is not a weakly prime, because it can be changed into another prime (1955658629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977829329 + 977829330.

It is an arithmetic number, because the mean of its divisors is an integer number (977829330).

Almost surely, 2^1955658659 is an apocalyptic number.

1955658659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955658659 is an equidigital number, since it uses as much as digits as its factorization.

1955658659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580000, while the sum is 59.

The square root of 1955658659 is about 44222.8296132213. The cubic root of 1955658659 is about 1250.5402803641.

The spelling of 1955658659 in words is "one billion, nine hundred fifty-five million, six hundred fifty-eight thousand, six hundred fifty-nine".