498641991 has 8 divisors (see below), whose sum is σ = 672326640. Its totient is φ = 328692672.

The previous prime is 498641971. The next prime is 498642019. The reversal of 498641991 is 199146894.

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

It is not a de Polignac number, because 498641991 - 2¹³ = 498633799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498641971) 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, 933520 + ... + 934053.

It is an arithmetic number, because the mean of its divisors is an integer number (84040830).

Almost surely, 2^498641991 is an apocalyptic number.

498641991 is a deficient number, since it is larger than the sum of its proper divisors (173684649).

498641991 is a wasteful number, since it uses less digits than its factorization.

498641991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867665.

The product of its digits is 559872, while the sum is 51.

The square root of 498641991 is about 22330.2931239158. The cubic root of 498641991 is about 792.9813061475.

The spelling of 498641991 in words is "four hundred ninety-eight million, six hundred forty-one thousand, nine hundred ninety-one".