101601643 has 12 divisors (see below), whose sum is σ = 120270304. Its totient is φ = 85258800.

The previous prime is 101601629. The next prime is 101601659. The reversal of 101601643 is 346106101.

It is a happy number.

It is not a de Polignac number, because 101601643 - 2¹³ = 101593451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101601613) 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 11 ways as a sum of consecutive naturals, for example, 30723 + ... + 33868.

Almost surely, 2^101601643 is an apocalyptic number.

101601643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

101601643 is a deficient number, since it is larger than the sum of its proper divisors (18668661).

101601643 is a wasteful number, since it uses less digits than its factorization.

101601643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64626 (or 64615 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 101601643 is about 10079.7640349365. The cubic root of 101601643 is about 466.6238260560.

Adding to 101601643 its reverse (346106101), we get a palindrome (447707744).

The spelling of 101601643 in words is "one hundred one million, six hundred one thousand, six hundred forty-three".