100021623 has 8 divisors (see below), whose sum is σ = 143620848. Its totient is φ = 61551744.

The previous prime is 100021589. The next prime is 100021627. The reversal of 100021623 is 326120001.

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

It is not a de Polignac number, because 100021623 - 2⁸ = 100021367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021627) 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, 1282290 + ... + 1282367.

It is an arithmetic number, because the mean of its divisors is an integer number (17952606).

Almost surely, 2^100021623 is an apocalyptic number.

100021623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100021623 is a deficient number, since it is larger than the sum of its proper divisors (43599225).

100021623 is a wasteful number, since it uses less digits than its factorization.

100021623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564673.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 100021623 is about 10001.0810915621. The cubic root of 100021623 is about 464.1923359754.

Adding to 100021623 its reverse (326120001), we get a palindrome (426141624).

The spelling of 100021623 in words is "one hundred million, twenty-one thousand, six hundred twenty-three".