998774079 has 4 divisors (see below), whose sum is σ = 1331698776. Its totient is φ = 665849384.

The previous prime is 998774053. The next prime is 998774093. The reversal of 998774079 is 970477899.

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 998774079 - 2¹⁵ = 998741311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998774039) 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, 166462344 + ... + 166462349.

It is an arithmetic number, because the mean of its divisors is an integer number (332924694).

Almost surely, 2^998774079 is an apocalyptic number.

998774079 is a deficient number, since it is larger than the sum of its proper divisors (332924697).

998774079 is a wasteful number, since it uses less digits than its factorization.

998774079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332924696.

The product of its (nonzero) digits is 8001504, while the sum is 60.

The square root of 998774079 is about 31603.3871444186. The cubic root of 998774079 is about 999.5911925659.

The spelling of 998774079 in words is "nine hundred ninety-eight million, seven hundred seventy-four thousand, seventy-nine".