4990551 has 4 divisors (see below), whose sum is σ = 6654072. Its totient is φ = 3327032.

The previous prime is 4990547. The next prime is 4990567. The reversal of 4990551 is 1550994.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4990551 - 2² = 4990547 is a prime.

It is a D-number.

4990551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4990501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831756 + ... + 831761.

It is an arithmetic number, because the mean of its divisors is an integer number (1663518).

Almost surely, 2^4990551 is an apocalyptic number.

4990551 is a deficient number, since it is larger than the sum of its proper divisors (1663521).

4990551 is a wasteful number, since it uses less digits than its factorization.

4990551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663520.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 4990551 is about 2233.9541177025. The cubic root of 4990551 is about 170.8898096570.

The spelling of 4990551 in words is "four million, nine hundred ninety thousand, five hundred fifty-one".