1641947017 has 4 divisors (see below), whose sum is σ = 1642314880. Its totient is φ = 1641579156.

The previous prime is 1641947009. The next prime is 1641947029. The reversal of 1641947017 is 7107491461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1641947017 - 2³ = 1641947009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641947077) 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 in 3 ways as a sum of consecutive naturals, for example, 177153 + ... + 186190.

It is an arithmetic number, because the mean of its divisors is an integer number (410578720).

Almost surely, 2^1641947017 is an apocalyptic number.

It is an amenable number.

1641947017 is a deficient number, since it is larger than the sum of its proper divisors (367863).

1641947017 is an equidigital number, since it uses as much as digits as its factorization.

1641947017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367862.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1641947017 is about 40520.9454109847. The cubic root of 1641947017 is about 1179.7402035067.

It can be divided in two parts, 16419 and 47017, that added together give a palindrome (63436).

The spelling of 1641947017 in words is "one billion, six hundred forty-one million, nine hundred forty-seven thousand, seventeen".