7691389 has 2 divisors, whose sum is σ = 7691390. Its totient is φ = 7691388.

The previous prime is 7691381. The next prime is 7691401. The reversal of 7691389 is 9831967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4995225 + 2696164 = 2235^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 7691389 - 2³ = 7691381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7691381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845694 + 3845695.

It is an arithmetic number, because the mean of its divisors is an integer number (3845695).

Almost surely, 2^7691389 is an apocalyptic number.

It is an amenable number.

7691389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7691389 is an equidigital number, since it uses as much as digits as its factorization.

7691389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 7691389 is about 2773.3353565698. The cubic root of 7691389 is about 197.3944444763.

The spelling of 7691389 in words is "seven million, six hundred ninety-one thousand, three hundred eighty-nine".