4977991 has 8 divisors (see below), whose sum is σ = 5290704. Its totient is φ = 4667520.

The previous prime is 4977979. The next prime is 4978003. The reversal of 4977991 is 1997794.

It is an interprime number because it is at equal distance from previous prime (4977979) and next prime (4978003).

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

It is not a de Polignac number, because 4977991 - 2¹³ = 4969799 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 (4977901) 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, 7201 + ... + 7861.

It is an arithmetic number, because the mean of its divisors is an integer number (661338).

Almost surely, 2^4977991 is an apocalyptic number.

4977991 is a deficient number, since it is larger than the sum of its proper divisors (312713).

4977991 is a wasteful number, since it uses less digits than its factorization.

4977991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 142884, while the sum is 46.

The square root of 4977991 is about 2231.1411878229. The cubic root of 4977991 is about 170.7463265582.

The spelling of 4977991 in words is "four million, nine hundred seventy-seven thousand, nine hundred ninety-one".