2391979667 has 24 divisors (see below), whose sum is σ = 3034659936. Its totient is φ = 1845360000.

The previous prime is 2391979643. The next prime is 2391979717. The reversal of 2391979667 is 7669791932.

2391979667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2391979667 - 2¹² = 2391975571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2391979607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71567 + ... + 99527.

It is an arithmetic number, because the mean of its divisors is an integer number (126444164).

Almost surely, 2^2391979667 is an apocalyptic number.

2391979667 is a deficient number, since it is larger than the sum of its proper divisors (642680269).

2391979667 is a wasteful number, since it uses less digits than its factorization.

2391979667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28091 (or 28080 counting only the distinct ones).

The product of its digits is 7715736, while the sum is 59.

The square root of 2391979667 is about 48907.8691725575. The cubic root of 2391979667 is about 1337.3728259669.

The spelling of 2391979667 in words is "two billion, three hundred ninety-one million, nine hundred seventy-nine thousand, six hundred sixty-seven".