1002148909 has 4 divisors (see below), whose sum is σ = 1002908860. Its totient is φ = 1001388960.

The previous prime is 1002148907. The next prime is 1002148913. The reversal of 1002148909 is 9098412001.

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 938196900 + 63952009 = 30630^2 + 7997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002148909 - 2¹ = 1002148907 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 (1002148907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377994 + ... + 380635.

It is an arithmetic number, because the mean of its divisors is an integer number (250727215).

Almost surely, 2^1002148909 is an apocalyptic number.

It is an amenable number.

1002148909 is a deficient number, since it is larger than the sum of its proper divisors (759951).

1002148909 is an equidigital number, since it uses as much as digits as its factorization.

1002148909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759950.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1002148909 is about 31656.7356023959. The cubic root of 1002148909 is about 1000.7157905217.

The spelling of 1002148909 in words is "one billion, two million, one hundred forty-eight thousand, nine hundred nine".