2421736409 has 4 divisors (see below), whose sum is σ = 2549196240. Its totient is φ = 2294276580.

The previous prime is 2421736391. The next prime is 2421736433. The reversal of 2421736409 is 9046371242.

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.

It is a cyclic number.

It is not a de Polignac number, because 2421736409 - 2¹⁶ = 2421670873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2421736439) 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, 63729887 + ... + 63729924.

It is an arithmetic number, because the mean of its divisors is an integer number (637299060).

Almost surely, 2^2421736409 is an apocalyptic number.

It is an amenable number.

2421736409 is a deficient number, since it is larger than the sum of its proper divisors (127459831).

2421736409 is a wasteful number, since it uses less digits than its factorization.

2421736409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127459830.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 2421736409 is about 49211.1411064608. The cubic root of 2421736409 is about 1342.8957221703.

The spelling of 2421736409 in words is "two billion, four hundred twenty-one million, seven hundred thirty-six thousand, four hundred nine".