101390885 has 4 divisors (see below), whose sum is σ = 121669068. Its totient is φ = 81112704.

The previous prime is 101390881. The next prime is 101390893. The reversal of 101390885 is 588093101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22572001 + 78818884 = 4751^2 + 8878^2 .

It is a cyclic number.

It is not a de Polignac number, because 101390885 - 2² = 101390881 is a prime.

It is a super-2 number, since 2×101390885² = 20560223122166450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101390881) 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 3 ways as a sum of consecutive naturals, for example, 10139084 + ... + 10139093.

It is an arithmetic number, because the mean of its divisors is an integer number (30417267).

Almost surely, 2^101390885 is an apocalyptic number.

It is an amenable number.

101390885 is a deficient number, since it is larger than the sum of its proper divisors (20278183).

101390885 is an equidigital number, since it uses as much as digits as its factorization.

101390885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20278182.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 101390885 is about 10069.3040971062. The cubic root of 101390885 is about 466.3009546911.

The spelling of 101390885 in words is "one hundred one million, three hundred ninety thousand, eight hundred eighty-five".