7789249321 has 16 divisors (see below), whose sum is σ = 8966037376. Its totient is φ = 6628542336.

The previous prime is 7789249313. The next prime is 7789249337. The reversal of 7789249321 is 1239429877.

It is a cyclic number.

It is not a de Polignac number, because 7789249321 - 2³ = 7789249313 is a prime.

It is a super-2 number, since 2×7789249321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7789249301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1917925 + ... + 1921981.

It is an arithmetic number, because the mean of its divisors is an integer number (560377336).

Almost surely, 2^7789249321 is an apocalyptic number.

It is an amenable number.

7789249321 is a deficient number, since it is larger than the sum of its proper divisors (1176788055).

7789249321 is a wasteful number, since it uses less digits than its factorization.

7789249321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968.

The product of its digits is 1524096, while the sum is 52.

The square root of 7789249321 is about 88256.7239421451. The cubic root of 7789249321 is about 1982.2809241913.

The spelling of 7789249321 in words is "seven billion, seven hundred eighty-nine million, two hundred forty-nine thousand, three hundred twenty-one".