101906621 has 8 divisors (see below), whose sum is σ = 104799744. Its totient is φ = 99020880.

The previous prime is 101906611. The next prime is 101906681. The reversal of 101906621 is 126609101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101906621 - 2²² = 97712317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101906611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38036 + ... + 40626.

It is an arithmetic number, because the mean of its divisors is an integer number (13099968).

Almost surely, 2^101906621 is an apocalyptic number.

It is an amenable number.

101906621 is a deficient number, since it is larger than the sum of its proper divisors (2893123).

101906621 is a wasteful number, since it uses less digits than its factorization.

101906621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 101906621 is about 10094.8809304518. The cubic root of 101906621 is about 467.0902484588.

The spelling of 101906621 in words is "one hundred one million, nine hundred six thousand, six hundred twenty-one".