4991312 has 10 divisors (see below), whose sum is σ = 9670698. Its totient is φ = 2495648.

The previous prime is 4991303. The next prime is 4991317. The reversal of 4991312 is 2131994.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4910656 + 80656 = 2216^2 + 284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155963 + ... + 155994.

Almost surely, 2^4991312 is an apocalyptic number.

It is an amenable number.

4991312 is a deficient number, since it is larger than the sum of its proper divisors (4679386).

4991312 is a wasteful number, since it uses less digits than its factorization.

4991312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311965 (or 311959 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 4991312 is about 2234.1244369999. The cubic root of 4991312 is about 170.8984954404.

The spelling of 4991312 in words is "four million, nine hundred ninety-one thousand, three hundred twelve".