4991997 has 8 divisors (see below), whose sum is σ = 6671520. Its totient is φ = 3320240.

The previous prime is 4991983. The next prime is 4992007. The reversal of 4991997 is 7991994.

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 4991997 - 2⁶ = 4991933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991977) 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, 222 + ... + 3167.

It is an arithmetic number, because the mean of its divisors is an integer number (833940).

Almost surely, 2^4991997 is an apocalyptic number.

It is an amenable number.

4991997 is a deficient number, since it is larger than the sum of its proper divisors (1679523).

4991997 is a wasteful number, since it uses less digits than its factorization.

4991997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883.

The product of its digits is 183708, while the sum is 48.

The square root of 4991997 is about 2234.2777356452. The cubic root of 4991997 is about 170.9063130319.

The spelling of 4991997 in words is "four million, nine hundred ninety-one thousand, nine hundred ninety-seven".