499999961 has 16 divisors (see below), whose sum is σ = 531353088. Its totient is φ = 469718400.

The previous prime is 499999931. The next prime is 499999993. The reversal of 499999961 is 169999994.

It is a cyclic number.

It is not a de Polignac number, because 499999961 - 2⁶ = 499999897 is a prime.

It is a super-2 number, since 2×499999961² = 499999922000003042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499999931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287651 + ... + 289383.

It is an arithmetic number, because the mean of its divisors is an integer number (33209568).

Almost surely, 2^499999961 is an apocalyptic number.

499999961 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

499999961 is a deficient number, since it is larger than the sum of its proper divisors (31353127).

499999961 is a wasteful number, since it uses less digits than its factorization.

499999961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032.

The product of its digits is 12754584, while the sum is 65.

The square root of 499999961 is about 22360.6789029314. The cubic root of 499999961 is about 793.7005053479.

The spelling of 499999961 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-one".