1625089009 has 2 divisors, whose sum is σ = 1625089010. Its totient is φ = 1625089008.

The previous prime is 1625088947. The next prime is 1625089031. The reversal of 1625089009 is 9009805261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1624493025 + 595984 = 40305^2 + 772^2 .

It is an emirp because it is prime and its reverse (9009805261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1625089009 - 2²¹ = 1622991857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1625089069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812544504 + 812544505.

It is an arithmetic number, because the mean of its divisors is an integer number (812544505).

Almost surely, 2^1625089009 is an apocalyptic number.

It is an amenable number.

1625089009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625089009 is an equidigital number, since it uses as much as digits as its factorization.

1625089009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1625089009 is about 40312.3927471441. The cubic root of 1625089009 is about 1175.6888091043.

The spelling of 1625089009 in words is "one billion, six hundred twenty-five million, eighty-nine thousand, nine".