1002170090 has 8 divisors (see below), whose sum is σ = 1803906180. Its totient is φ = 400868032.

The previous prime is 1002170069. The next prime is 1002170101. The reversal of 1002170090 is 900712001.

It can be written as a sum of positive squares in 2 ways, for example, as 895026889 + 107143201 = 29917^2 + 10351^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50108495 + ... + 50108514.

Almost surely, 2^1002170090 is an apocalyptic number.

1002170090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002170090 is a deficient number, since it is larger than the sum of its proper divisors (801736090).

1002170090 is a wasteful number, since it uses less digits than its factorization.

1002170090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100217016.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1002170090 is about 31657.0701423868. The cubic root of 1002170090 is about 1000.7228407087.

Adding to 1002170090 its reverse (900712001), we get a palindrome (1902882091).

The spelling of 1002170090 in words is "one billion, two million, one hundred seventy thousand, ninety".