100623653 has 4 divisors (see below), whose sum is σ = 108363948. Its totient is φ = 92883360.

The previous prime is 100623647. The next prime is 100623661. The reversal of 100623653 is 356326001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 356326001 = 17 ⋅20960353.

It can be written as a sum of positive squares in 2 ways, for example, as 65966884 + 34656769 = 8122^2 + 5887^2 .

It is a cyclic number.

It is not a de Polignac number, because 100623653 - 2⁴ = 100623637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100623673) 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 3 ways as a sum of consecutive naturals, for example, 3870128 + ... + 3870153.

It is an arithmetic number, because the mean of its divisors is an integer number (27090987).

Almost surely, 2^100623653 is an apocalyptic number.

100623653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

100623653 is a deficient number, since it is larger than the sum of its proper divisors (7740295).

100623653 is an equidigital number, since it uses as much as digits as its factorization.

100623653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740294.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 100623653 is about 10031.1341831320. The cubic root of 100623653 is about 465.1217979785.

Adding to 100623653 its reverse (356326001), we get a palindrome (456949654).

The spelling of 100623653 in words is "one hundred million, six hundred twenty-three thousand, six hundred fifty-three".