998779011 has 8 divisors (see below), whose sum is σ = 1356832080. Its totient is φ = 653289312.

The previous prime is 998779003. The next prime is 998779013. The reversal of 998779011 is 110977899.

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

It is not a de Polignac number, because 998779011 - 2³ = 998779003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998779013) 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, 3140656 + ... + 3140973.

It is an arithmetic number, because the mean of its divisors is an integer number (169604010).

Almost surely, 2^998779011 is an apocalyptic number.

998779011 is a deficient number, since it is larger than the sum of its proper divisors (358053069).

998779011 is a wasteful number, since it uses less digits than its factorization.

998779011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6281685.

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 998779011 is about 31603.4651739331. The cubic root of 998779011 is about 999.5928379082.

The spelling of 998779011 in words is "nine hundred ninety-eight million, seven hundred seventy-nine thousand, eleven".