1998000501 has 64 divisors (see below), whose sum is σ = 3337113600. Its totient is φ = 1038191616.

The previous prime is 1998000493. The next prime is 1998000509. The reversal of 1998000501 is 1050008991.

It is an interprime number because it is at equal distance from previous prime (1998000493) and next prime (1998000509).

It is not a de Polignac number, because 1998000501 - 2³ = 1998000493 is a prime.

It is a super-4 number, since 4×1998000501⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998000509) 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 63 ways as a sum of consecutive naturals, for example, 937405 + ... + 939533.

It is an arithmetic number, because the mean of its divisors is an integer number (52142400).

Almost surely, 2^1998000501 is an apocalyptic number.

It is an amenable number.

1998000501 is a deficient number, since it is larger than the sum of its proper divisors (1339113099).

1998000501 is a wasteful number, since it uses less digits than its factorization.

1998000501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2258.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 1998000501 is about 44698.9988814067. The cubic root of 1998000501 is about 1259.5010414161.

The spelling of 1998000501 in words is "one billion, nine hundred ninety-eight million, five hundred one", and thus it is an aban number.