1617609943 has 2 divisors, whose sum is σ = 1617609944. Its totient is φ = 1617609942.

The previous prime is 1617609901. The next prime is 1617609967. The reversal of 1617609943 is 3499067161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617609943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1617609893 and 1617609902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617604943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808804971 + 808804972.

It is an arithmetic number, because the mean of its divisors is an integer number (808804972).

Almost surely, 2^1617609943 is an apocalyptic number.

1617609943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617609943 is an equidigital number, since it uses as much as digits as its factorization.

1617609943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1617609943 is about 40219.5219141153. The cubic root of 1617609943 is about 1173.8824304949.

The spelling of 1617609943 in words is "one billion, six hundred seventeen million, six hundred nine thousand, nine hundred forty-three".