2438779397 has 4 divisors (see below), whose sum is σ = 2438885280. Its totient is φ = 2438673516.

The previous prime is 2438779391. The next prime is 2438779411. The reversal of 2438779397 is 7939778342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2438779397 - 2²⁰ = 2437730821 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 (2438779391) by changing a digit.

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, 2147 + ... + 69872.

It is an arithmetic number, because the mean of its divisors is an integer number (609721320).

Almost surely, 2^2438779397 is an apocalyptic number.

It is an amenable number.

2438779397 is a deficient number, since it is larger than the sum of its proper divisors (105883).

2438779397 is an equidigital number, since it uses as much as digits as its factorization.

2438779397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105882.

The product of its digits is 16003008, while the sum is 59.

The square root of 2438779397 is about 49383.9994026405. Note that the first 3 decimals coincide. The cubic root of 2438779397 is about 1346.0385739251.

Adding to 2438779397 its sum of digits (59), we get a square (2438779456 = 49384²).

The spelling of 2438779397 in words is "two billion, four hundred thirty-eight million, seven hundred seventy-nine thousand, three hundred ninety-seven".