1000315661 has 4 divisors (see below), whose sum is σ = 1000474332. Its totient is φ = 1000156992.

The previous prime is 1000315651. The next prime is 1000315721. The reversal of 1000315661 is 1665130001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 750486025 + 249829636 = 27395^2 + 15806^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000315661 - 2¹⁸ = 1000053517 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 (1000315601) 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 3 ways as a sum of consecutive naturals, for example, 69470 + ... + 82623.

It is an arithmetic number, because the mean of its divisors is an integer number (250118583).

Almost surely, 2^1000315661 is an apocalyptic number.

It is an amenable number.

1000315661 is a deficient number, since it is larger than the sum of its proper divisors (158671).

1000315661 is an equidigital number, since it uses as much as digits as its factorization.

1000315661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158670.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1000315661 is about 31627.7672465193. The cubic root of 1000315661 is about 1000.1052092640.

Adding to 1000315661 its reverse (1665130001), we get a palindrome (2665445662).

The spelling of 1000315661 in words is "one billion, three hundred fifteen thousand, six hundred sixty-one".