5209101998 has 8 divisors (see below), whose sum is σ = 7830385992. Its totient is φ = 2598973336.

The previous prime is 5209101973. The next prime is 5209102007. The reversal of 5209101998 is 8991019025.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2787665 + ... + 2789532.

It is an arithmetic number, because the mean of its divisors is an integer number (978798249).

Almost surely, 2^5209101998 is an apocalyptic number.

5209101998 is a deficient number, since it is larger than the sum of its proper divisors (2621283994).

5209101998 is a wasteful number, since it uses less digits than its factorization.

5209101998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5577666.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 5209101998 is about 72174.1089172565. The cubic root of 5209101998 is about 1733.4884556520.

The spelling of 5209101998 in words is "five billion, two hundred nine million, one hundred one thousand, nine hundred ninety-eight".