101609643 has 4 divisors (see below), whose sum is σ = 135479528. Its totient is φ = 67739760.

The previous prime is 101609621. The next prime is 101609671. The reversal of 101609643 is 346906101.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 101609643 - 2¹⁴ = 101593259 is a prime.

It is a super-3 number, since 3×101609643³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101609643.

It is not an unprimeable number, because it can be changed into a prime (101609843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16934938 + ... + 16934943.

It is an arithmetic number, because the mean of its divisors is an integer number (33869882).

Almost surely, 2^101609643 is an apocalyptic number.

101609643 is a deficient number, since it is larger than the sum of its proper divisors (33869885).

101609643 is an equidigital number, since it uses as much as digits as its factorization.

101609643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33869884.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 101609643 is about 10080.1608618117. The cubic root of 101609643 is about 466.6360728810.

The spelling of 101609643 in words is "one hundred one million, six hundred nine thousand, six hundred forty-three".