1293940009 has 4 divisors (see below), whose sum is σ = 1338558660. Its totient is φ = 1249321360.

The previous prime is 1293940001. The next prime is 1293940013. The reversal of 1293940009 is 9000493921.

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 942490000 + 351450009 = 30700^2 + 18747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1293940009 - 2³ = 1293940001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1293940009.

It is not an unprimeable number, because it can be changed into a prime (1293940001) 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, 22309282 + ... + 22309339.

It is an arithmetic number, because the mean of its divisors is an integer number (334639665).

Almost surely, 2^1293940009 is an apocalyptic number.

It is an amenable number.

1293940009 is a deficient number, since it is larger than the sum of its proper divisors (44618651).

1293940009 is an equidigital number, since it uses as much as digits as its factorization.

1293940009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44618650.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1293940009 is about 35971.3776355591. The cubic root of 1293940009 is about 1089.6943870081.

The spelling of 1293940009 in words is "one billion, two hundred ninety-three million, nine hundred forty thousand, nine".