4729691891 has 4 divisors (see below), whose sum is σ = 4739404272. Its totient is φ = 4719979512.

The previous prime is 4729691887. The next prime is 4729691893. The reversal of 4729691891 is 1981969274.

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 4729691891 - 2² = 4729691887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4729691893) 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, 4855460 + ... + 4856433.

It is an arithmetic number, because the mean of its divisors is an integer number (1184851068).

Almost surely, 2^4729691891 is an apocalyptic number.

4729691891 is a deficient number, since it is larger than the sum of its proper divisors (9712381).

4729691891 is an equidigital number, since it uses as much as digits as its factorization.

4729691891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712380.

The product of its digits is 1959552, while the sum is 56.

The square root of 4729691891 is about 68772.7554413810. The cubic root of 4729691891 is about 1678.5886544139.

The spelling of 4729691891 in words is "four billion, seven hundred twenty-nine million, six hundred ninety-one thousand, eight hundred ninety-one".