7631389 has 4 divisors (see below), whose sum is σ = 7682080. Its totient is φ = 7580700.

The previous prime is 7631387. The next prime is 7631401. The reversal of 7631389 is 9831367.

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 7631389 - 2¹ = 7631387 is a prime.

It is a super-3 number, since 3×7631389³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7631381) 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, 25119 + ... + 25420.

It is an arithmetic number, because the mean of its divisors is an integer number (1920520).

Almost surely, 2^7631389 is an apocalyptic number.

It is an amenable number.

7631389 is a deficient number, since it is larger than the sum of its proper divisors (50691).

7631389 is a wasteful number, since it uses less digits than its factorization.

7631389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50690.

The product of its digits is 27216, while the sum is 37.

The square root of 7631389 is about 2762.4968778263. The cubic root of 7631389 is about 196.8798170989.

The spelling of 7631389 in words is "seven million, six hundred thirty-one thousand, three hundred eighty-nine".