2420644397 has 4 divisors (see below), whose sum is σ = 2423217756. Its totient is φ = 2418071040.

The previous prime is 2420644379. The next prime is 2420644411. The reversal of 2420644397 is 7934460242.

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 2067429961 + 353214436 = 45469^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420644397 - 2⁶ = 2420644333 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 (2420644367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285268 + ... + 1287149.

It is an arithmetic number, because the mean of its divisors is an integer number (605804439).

Almost surely, 2^2420644397 is an apocalyptic number.

It is an amenable number.

2420644397 is a deficient number, since it is larger than the sum of its proper divisors (2573359).

2420644397 is an equidigital number, since it uses as much as digits as its factorization.

2420644397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573358.

The product of its (nonzero) digits is 290304, while the sum is 41.

The square root of 2420644397 is about 49200.0446849391. The cubic root of 2420644397 is about 1342.6938451601.

The spelling of 2420644397 in words is "two billion, four hundred twenty million, six hundred forty-four thousand, three hundred ninety-seven".