101839749 has 16 divisors (see below), whose sum is σ = 148621824. Its totient is φ = 61516400.

The previous prime is 101839747. The next prime is 101839757. The reversal of 101839749 is 947938101.

It is a happy number.

It is not a de Polignac number, because 101839749 - 2¹ = 101839747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101839749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101839747) 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 15 ways as a sum of consecutive naturals, for example, 5302 + ... + 15224.

It is an arithmetic number, because the mean of its divisors is an integer number (9288864).

Almost surely, 2^101839749 is an apocalyptic number.

It is an amenable number.

101839749 is a deficient number, since it is larger than the sum of its proper divisors (46782075).

101839749 is a wasteful number, since it uses less digits than its factorization.

101839749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10248.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 101839749 is about 10091.5682131173. The cubic root of 101839749 is about 466.9880565582.

The spelling of 101839749 in words is "one hundred one million, eight hundred thirty-nine thousand, seven hundred forty-nine".