3631602421 has 2 divisors, whose sum is σ = 3631602422. Its totient is φ = 3631602420.

The previous prime is 3631602419. The next prime is 3631602431. The reversal of 3631602421 is 1242061363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2886912900 + 744689521 = 53730^2 + 27289^2 .

It is an emirp because it is prime and its reverse (1242061363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3631602421 - 2¹ = 3631602419 is a prime.

It is a super-2 number, since 2×3631602421² = 26377072288426122482, which contains 22 as substring.

Together with 3631602419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3631602421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3631602431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815801210 + 1815801211.

It is an arithmetic number, because the mean of its divisors is an integer number (1815801211).

Almost surely, 2^3631602421 is an apocalyptic number.

It is an amenable number.

3631602421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631602421 is an equidigital number, since it uses as much as digits as its factorization.

3631602421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 3631602421 is about 60262.7780723723. The cubic root of 3631602421 is about 1537.0904784212.

Adding to 3631602421 its reverse (1242061363), we get a palindrome (4873663784).

The spelling of 3631602421 in words is "three billion, six hundred thirty-one million, six hundred two thousand, four hundred twenty-one".