990077 has 4 divisors (see below), whose sum is σ = 1080096. Its totient is φ = 900060.

The previous prime is 990053. The next prime is 990137. The reversal of 990077 is 770099.

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, and also an emirpimes, since its reverse is a distinct semiprime: 770099 = 11 ⋅70009.

It is a cyclic number.

It is not a de Polignac number, because 990077 - 2⁶ = 990013 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44993 + ... + 45014.

It is an arithmetic number, because the mean of its divisors is an integer number (270024).

2⁹⁹⁰⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

990077 is a deficient number, since it is larger than the sum of its proper divisors (90019).

990077 is a wasteful number, since it uses less digits than its factorization.

990077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90018.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 990077 is about 995.0261303102. The cubic root of 990077 is about 99.6681331959.

The spelling of 990077 in words is "nine hundred ninety thousand, seventy-seven".