4897731621 has 4 divisors (see below), whose sum is σ = 6530308832. Its totient is φ = 3265154412.

The previous prime is 4897731617. The next prime is 4897731653. The reversal of 4897731621 is 1261377984.

It is a happy number.

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 not a de Polignac number, because 4897731621 - 2² = 4897731617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4897731121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816288601 + ... + 816288606.

It is an arithmetic number, because the mean of its divisors is an integer number (1632577208).

Almost surely, 2^4897731621 is an apocalyptic number.

It is an amenable number.

4897731621 is a deficient number, since it is larger than the sum of its proper divisors (1632577211).

4897731621 is a wasteful number, since it uses less digits than its factorization.

4897731621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632577210.

The product of its digits is 508032, while the sum is 48.

The square root of 4897731621 is about 69983.7954172250. The cubic root of 4897731621 is about 1698.2371138251.

The spelling of 4897731621 in words is "four billion, eight hundred ninety-seven million, seven hundred thirty-one thousand, six hundred twenty-one".