4023491779 has 4 divisors (see below), whose sum is σ = 4260167784. Its totient is φ = 3786815776.

The previous prime is 4023491753. The next prime is 4023491803. The reversal of 4023491779 is 9771943204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4023491779 - 2²¹ = 4021394627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4023491179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118337977 + ... + 118338010.

It is an arithmetic number, because the mean of its divisors is an integer number (1065041946).

Almost surely, 2^4023491779 is an apocalyptic number.

4023491779 is a deficient number, since it is larger than the sum of its proper divisors (236676005).

4023491779 is a wasteful number, since it uses less digits than its factorization.

4023491779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236676004.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 4023491779 is about 63431.0001418865. Note that the first 3 decimals coincide. The cubic root of 4023491779 is about 1590.5025610967.

The spelling of 4023491779 in words is "four billion, twenty-three million, four hundred ninety-one thousand, seven hundred seventy-nine".