7678376989 has 4 divisors (see below), whose sum is σ = 7693642656. Its totient is φ = 7663111324.

The previous prime is 7678376969. The next prime is 7678377037. The reversal of 7678376989 is 9896738767.

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 7678376989 - 2¹⁵ = 7678344221 is a prime.

It is a super-2 number, since 2×7678376989² (a number of 21 digits) contains 22 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 (7678376969) 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, 7632079 + ... + 7633084.

It is an arithmetic number, because the mean of its divisors is an integer number (1923410664).

Almost surely, 2^7678376989 is an apocalyptic number.

It is an amenable number.

7678376989 is a deficient number, since it is larger than the sum of its proper divisors (15265667).

7678376989 is a wasteful number, since it uses less digits than its factorization.

7678376989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15265666.

The product of its digits is 192036096, while the sum is 70.

The square root of 7678376989 is about 87626.3487142994. The cubic root of 7678376989 is about 1972.8306674046.

The spelling of 7678376989 in words is "seven billion, six hundred seventy-eight million, three hundred seventy-six thousand, nine hundred eighty-nine".