4821691 has 4 divisors (see below), whose sum is σ = 5510512. Its totient is φ = 4132872.

The previous prime is 4821689. The next prime is 4821721. The reversal of 4821691 is 1961284.

It is a happy number.

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 4821691 - 2¹ = 4821689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4821631) 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, 344400 + ... + 344413.

It is an arithmetic number, because the mean of its divisors is an integer number (1377628).

Almost surely, 2^4821691 is an apocalyptic number.

4821691 is a deficient number, since it is larger than the sum of its proper divisors (688821).

4821691 is an equidigital number, since it uses as much as digits as its factorization.

4821691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688820.

The product of its digits is 3456, while the sum is 31.

The square root of 4821691 is about 2195.8349209355. The cubic root of 4821691 is about 168.9402470737.

The spelling of 4821691 in words is "four million, eight hundred twenty-one thousand, six hundred ninety-one".