155598643 has 2 divisors, whose sum is σ = 155598644. Its totient is φ = 155598642.

The previous prime is 155598631. The next prime is 155598661. The reversal of 155598643 is 346895551.

It is a weak prime.

It is an emirp because it is prime and its reverse (346895551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155598643 - 2¹³ = 155590451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155598593 and 155598602.

It is not a weakly prime, because it can be changed into another prime (155598613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77799321 + 77799322.

It is an arithmetic number, because the mean of its divisors is an integer number (77799322).

Almost surely, 2^155598643 is an apocalyptic number.

155598643 is a deficient number, since it is larger than the sum of its proper divisors (1).

155598643 is an equidigital number, since it uses as much as digits as its factorization.

155598643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 46.

The square root of 155598643 is about 12473.9185102357. The cubic root of 155598643 is about 537.8592001745.

The spelling of 155598643 in words is "one hundred fifty-five million, five hundred ninety-eight thousand, six hundred forty-three".