102921639 has 8 divisors (see below), whose sum is σ = 137276400. Its totient is φ = 68590656.

The previous prime is 102921593. The next prime is 102921641. The reversal of 102921639 is 936129201.

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

It is not a de Polignac number, because 102921639 - 2¹² = 102917543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102921649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11337 + ... + 18285.

It is an arithmetic number, because the mean of its divisors is an integer number (17159550).

Almost surely, 2^102921639 is an apocalyptic number.

102921639 is a deficient number, since it is larger than the sum of its proper divisors (34354761).

102921639 is an equidigital number, since it uses as much as digits as its factorization.

102921639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11889.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 102921639 is about 10145.0302611673. The cubic root of 102921639 is about 468.6359105095.

The spelling of 102921639 in words is "one hundred two million, nine hundred twenty-one thousand, six hundred thirty-nine".