498992391 has 6 divisors (see below), whose sum is σ = 720766800. Its totient is φ = 332661588.

The previous prime is 498992369. The next prime is 498992407. The reversal of 498992391 is 193299894.

It is not a de Polignac number, because 498992391 - 2¹⁸ = 498730247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498992311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27721791 + ... + 27721808.

It is an arithmetic number, because the mean of its divisors is an integer number (120127800).

Almost surely, 2^498992391 is an apocalyptic number.

498992391 is a deficient number, since it is larger than the sum of its proper divisors (221774409).

498992391 is a wasteful number, since it uses less digits than its factorization.

498992391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55443605 (or 55443602 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 498992391 is about 22338.1375902290. The cubic root of 498992391 is about 793.1670075760.

The spelling of 498992391 in words is "four hundred ninety-eight million, nine hundred ninety-two thousand, three hundred ninety-one".