1904130009 has 6 divisors (see below), whose sum is σ = 2750410026. Its totient is φ = 1269420000.

The previous prime is 1904129989. The next prime is 1904130013. The reversal of 1904130009 is 9000314091.

It can be written as a sum of positive squares in only one way, i.e., 1845561600 + 58568409 = 42960^2 + 7653^2 .

It is not a de Polignac number, because 1904130009 - 2⁷ = 1904129881 is a prime.

It is a super-2 number, since 2×1904130009² = 7251422182348680162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1904138009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105784992 + ... + 105785009.

It is an arithmetic number, because the mean of its divisors is an integer number (458401671).

Almost surely, 2^1904130009 is an apocalyptic number.

It is an amenable number.

1904130009 is a deficient number, since it is larger than the sum of its proper divisors (846280017).

1904130009 is a wasteful number, since it uses less digits than its factorization.

1904130009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211570007 (or 211570004 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1904130009 is about 43636.3381712994. The cubic root of 1904130009 is about 1239.4590965951.

The spelling of 1904130009 in words is "one billion, nine hundred four million, one hundred thirty thousand, nine".