990730887 has 8 divisors (see below), whose sum is σ = 1323348336. Its totient is φ = 659300352.

The previous prime is 990730883. The next prime is 990730901. The reversal of 990730887 is 788037099.

It is a happy number.

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

It is not a de Polignac number, because 990730887 - 2² = 990730883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990730883) 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, 294778 + ... + 298119.

It is an arithmetic number, because the mean of its divisors is an integer number (165418542).

Almost surely, 2^990730887 is an apocalyptic number.

990730887 is a deficient number, since it is larger than the sum of its proper divisors (332617449).

990730887 is a wasteful number, since it uses less digits than its factorization.

990730887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593457.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 990730887 is about 31475.8778590844. The cubic root of 990730887 is about 996.9006999293.

The spelling of 990730887 in words is "nine hundred ninety million, seven hundred thirty thousand, eight hundred eighty-seven".