2390436509 has 4 divisors (see below), whose sum is σ = 2396581980. Its totient is φ = 2384291040.

The previous prime is 2390436479. The next prime is 2390436523. The reversal of 2390436509 is 9056340932.

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 1261812484 + 1128624025 = 35522^2 + 33595^2 .

It is a cyclic number.

It is not a de Polignac number, because 2390436509 - 2¹⁶ = 2390370973 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 (2390436109) 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, 3072152 + ... + 3072929.

It is an arithmetic number, because the mean of its divisors is an integer number (599145495).

Almost surely, 2^2390436509 is an apocalyptic number.

It is an amenable number.

2390436509 is a deficient number, since it is larger than the sum of its proper divisors (6145471).

2390436509 is an equidigital number, since it uses as much as digits as its factorization.

2390436509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6145470.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 2390436509 is about 48892.0904543874. The cubic root of 2390436509 is about 1337.0851672310.

The spelling of 2390436509 in words is "two billion, three hundred ninety million, four hundred thirty-six thousand, five hundred nine".