1621875099 has 8 divisors (see below), whose sum is σ = 2328846352. Its totient is φ = 998076960.

The previous prime is 1621875023. The next prime is 1621875103. The reversal of 1621875099 is 9905781261.

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

It is a de Polignac number, because none of the positive numbers 2^k-1621875099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1621875799) 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 7 ways as a sum of consecutive naturals, for example, 20793232 + ... + 20793309.

It is an arithmetic number, because the mean of its divisors is an integer number (291105794).

Almost surely, 2^1621875099 is an apocalyptic number.

1621875099 is a deficient number, since it is larger than the sum of its proper divisors (706971253).

1621875099 is a wasteful number, since it uses less digits than its factorization.

1621875099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41586557.

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 1621875099 is about 40272.5104630938. The cubic root of 1621875099 is about 1174.9132512386.

The spelling of 1621875099 in words is "one billion, six hundred twenty-one million, eight hundred seventy-five thousand, ninety-nine".