7631021 has 2 divisors, whose sum is σ = 7631022. Its totient is φ = 7631020.

The previous prime is 7630999. The next prime is 7631051. The reversal of 7631021 is 1201367.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7365796 + 265225 = 2714^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 7631021 - 2²² = 3436717 is a prime.

It is a super-3 number, since 3×7631021³ (a number of 22 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7630984 and 7631002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7631051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3815510 + 3815511.

It is an arithmetic number, because the mean of its divisors is an integer number (3815511).

Almost surely, 2^7631021 is an apocalyptic number.

It is an amenable number.

7631021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7631021 is an equidigital number, since it uses as much as digits as its factorization.

7631021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 7631021 is about 2762.4302706132. The cubic root of 7631021 is about 196.8766524091.

Adding to 7631021 its reverse (1201367), we get a palindrome (8832388).

The spelling of 7631021 in words is "seven million, six hundred thirty-one thousand, twenty-one".