1001617861 has 8 divisors (see below), whose sum is σ = 1029307520. Its totient is φ = 973960848.

The previous prime is 1001617847. The next prime is 1001617871. The reversal of 1001617861 is 1687161001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001617861 - 2⁷ = 1001617733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001617831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62320 + ... + 76726.

It is an arithmetic number, because the mean of its divisors is an integer number (128663440).

Almost surely, 2^1001617861 is an apocalyptic number.

It is an amenable number.

1001617861 is a deficient number, since it is larger than the sum of its proper divisors (27689659).

1001617861 is a wasteful number, since it uses less digits than its factorization.

1001617861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16323.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 1001617861 is about 31648.3468920574. The cubic root of 1001617861 is about 1000.5389964307.

Adding to 1001617861 its reverse (1687161001), we get a palindrome (2688778862).

The spelling of 1001617861 in words is "one billion, one million, six hundred seventeen thousand, eight hundred sixty-one".