2390427665 has 4 divisors (see below), whose sum is σ = 2868513204. Its totient is φ = 1912342128.

The previous prime is 2390427659. The next prime is 2390427671. The reversal of 2390427665 is 5667240932.

It is a Cunningham number, because it is equal to 48892²+1.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2390427659) and next prime (2390427671).

It can be written as a sum of positive squares in 2 ways, for example, as 860600896 + 1529826769 = 29336^2 + 39113^2 .

It is a cyclic number.

It is not a de Polignac number, because 2390427665 - 2¹⁴ = 2390411281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239042762 + ... + 239042771.

It is an arithmetic number, because the mean of its divisors is an integer number (717128301).

Almost surely, 2^2390427665 is an apocalyptic number.

It is an amenable number.

2390427665 is a deficient number, since it is larger than the sum of its proper divisors (478085539).

2390427665 is an equidigital number, since it uses as much as digits as its factorization.

2390427665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478085538.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 2390427665 is about 48892.0000102266. Note that the first 4 decimals coincide. The cubic root of 2390427665 is about 1337.0835182719.

The spelling of 2390427665 in words is "two billion, three hundred ninety million, four hundred twenty-seven thousand, six hundred sixty-five".