499035991 has 4 divisors (see below), whose sum is σ = 520733232. Its totient is φ = 477338752.

The previous prime is 499035967. The next prime is 499036009. The reversal of 499035991 is 199530994.

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 499035991 - 2¹⁵ = 499003223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499032991) 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, 10848586 + ... + 10848631.

It is an arithmetic number, because the mean of its divisors is an integer number (130183308).

Almost surely, 2^499035991 is an apocalyptic number.

499035991 is a deficient number, since it is larger than the sum of its proper divisors (21697241).

499035991 is a wasteful number, since it uses less digits than its factorization.

499035991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21697240.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 499035991 is about 22339.1134783814. The cubic root of 499035991 is about 793.1901081783.

The spelling of 499035991 in words is "four hundred ninety-nine million, thirty-five thousand, nine hundred ninety-one".