990877051141 has 4 divisors (see below), whose sum is σ = 990879349984. Its totient is φ = 990874752300.

The previous prime is 990877051139. The next prime is 990877051147. The reversal of 990877051141 is 141150778099.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a 3-Lehmer number, since φ(990877051141) divides (990877051141-1)³.

It is a cyclic number.

It is not a de Polignac number, because 990877051141 - 2¹ = 990877051139 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 (990877051147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287355 + ... + 1436776.

It is an arithmetic number, because the mean of its divisors is an integer number (247719837496).

It is a Poulet number, since it divides 2^990877051140-1.

Almost surely, 2^990877051141 is an apocalyptic number.

990877051141 is the 574711-st octagonal number.

It is an amenable number.

990877051141 is a deficient number, since it is larger than the sum of its proper divisors (2298843).

990877051141 is a wasteful number, since it uses less digits than its factorization.

990877051141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298842.

The product of its (nonzero) digits is 635040, while the sum is 52.

The spelling of 990877051141 in words is "nine hundred ninety billion, eight hundred seventy-seven million, fifty-one thousand, one hundred forty-one".