7639481 has 2 divisors, whose sum is σ = 7639482. Its totient is φ = 7639480.

The previous prime is 7639439. The next prime is 7639487. The reversal of 7639481 is 1849367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7398400 + 241081 = 2720^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 7639481 - 2⁶ = 7639417 is a prime.

It is a super-2 number, since 2×7639481² = 116723339898722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7639487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819740 + 3819741.

It is an arithmetic number, because the mean of its divisors is an integer number (3819741).

Almost surely, 2^7639481 is an apocalyptic number.

It is an amenable number.

7639481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7639481 is an equidigital number, since it uses as much as digits as its factorization.

7639481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 7639481 is about 2763.9611068175. The cubic root of 7639481 is about 196.9493801762.

The spelling of 7639481 in words is "seven million, six hundred thirty-nine thousand, four hundred eighty-one".