101636401 has 4 divisors (see below), whose sum is σ = 102642804. Its totient is φ = 100630000.

The previous prime is 101636399. The next prime is 101636441. The reversal of 101636401 is 104636101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104636101 = 101 ⋅1036001.

It can be written as a sum of positive squares in 2 ways, for example, as 87909376 + 13727025 = 9376^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 101636401 - 2¹ = 101636399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101636441) 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, 503050 + ... + 503251.

It is an arithmetic number, because the mean of its divisors is an integer number (25660701).

Almost surely, 2^101636401 is an apocalyptic number.

It is an amenable number.

101636401 is a deficient number, since it is larger than the sum of its proper divisors (1006403).

101636401 is a wasteful number, since it uses less digits than its factorization.

101636401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006402.

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

The square root of 101636401 is about 10081.4880350075. The cubic root of 101636401 is about 466.6770307789.

The spelling of 101636401 in words is "one hundred one million, six hundred thirty-six thousand, four hundred one".