4989958921 has 8 divisors (see below), whose sum is σ = 5224222080. Its totient is φ = 4759842192.

The previous prime is 4989958907. The next prime is 4989958931. The reversal of 4989958921 is 1298599894.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4989958921 - 2⁷ = 4989958793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4989958931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034145 + ... + 1038958.

It is an arithmetic number, because the mean of its divisors is an integer number (653027760).

Almost surely, 2^4989958921 is an apocalyptic number.

It is an amenable number.

4989958921 is a deficient number, since it is larger than the sum of its proper divisors (234263159).

4989958921 is a wasteful number, since it uses less digits than its factorization.

4989958921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073215.

The product of its digits is 16796160, while the sum is 64.

The square root of 4989958921 is about 70639.6412858956. The cubic root of 4989958921 is about 1708.8305126700.

The spelling of 4989958921 in words is "four billion, nine hundred eighty-nine million, nine hundred fifty-eight thousand, nine hundred twenty-one".