1617880379 has 2 divisors, whose sum is σ = 1617880380. Its totient is φ = 1617880378.

The previous prime is 1617880373. The next prime is 1617880403. The reversal of 1617880379 is 9730887161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1617880379 - 2²⁰ = 1616831803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1617880373) 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, 808940189 + 808940190.

It is an arithmetic number, because the mean of its divisors is an integer number (808940190).

Almost surely, 2^1617880379 is an apocalyptic number.

1617880379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617880379 is an equidigital number, since it uses as much as digits as its factorization.

1617880379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 1617880379 is about 40222.8837727978. The cubic root of 1617880379 is about 1173.9478443649.

The spelling of 1617880379 in words is "one billion, six hundred seventeen million, eight hundred eighty thousand, three hundred seventy-nine".