101001638 has 16 divisors (see below), whose sum is σ = 157212384. Its totient is φ = 48625920.

The previous prime is 101001631. The next prime is 101001653. The reversal of 101001638 is 836100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (9825774).

Almost surely, 2^101001638 is an apocalyptic number.

101001638 is a deficient number, since it is larger than the sum of its proper divisors (56210746).

101001638 is a wasteful number, since it uses less digits than its factorization.

101001638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14207.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 101001638 is about 10049.9571143364. The cubic root of 101001638 is about 465.7034683184.

Adding to 101001638 its reverse (836100101), we get a palindrome (937101739).

The spelling of 101001638 in words is "one hundred one million, one thousand, six hundred thirty-eight".