2634409721 has 4 divisors (see below), whose sum is σ = 2644426752. Its totient is φ = 2624392692.

The previous prime is 2634409703. The next prime is 2634409727. The reversal of 2634409721 is 1279044362.

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 2634409721 - 2²² = 2630215417 is a prime.

It is a super-2 number, since 2×2634409721² = 13880229156198595682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2634409727) 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, 5008121 + ... + 5008646.

It is an arithmetic number, because the mean of its divisors is an integer number (661106688).

Almost surely, 2^2634409721 is an apocalyptic number.

It is an amenable number.

2634409721 is a deficient number, since it is larger than the sum of its proper divisors (10017031).

2634409721 is a wasteful number, since it uses less digits than its factorization.

2634409721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10017030.

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

The square root of 2634409721 is about 51326.5011568098. The cubic root of 2634409721 is about 1381.1084214175.

The spelling of 2634409721 in words is "two billion, six hundred thirty-four million, four hundred nine thousand, seven hundred twenty-one".