101990635 has 4 divisors (see below), whose sum is σ = 122388768. Its totient is φ = 81592504.

The previous prime is 101990617. The next prime is 101990641. The reversal of 101990635 is 536099101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 536099101 = 521 ⋅1028981.

It is a cyclic number.

It is not a de Polignac number, because 101990635 - 2¹¹ = 101988587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101990635.

It is an unprimeable number.

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, 10199059 + ... + 10199068.

It is an arithmetic number, because the mean of its divisors is an integer number (30597192).

Almost surely, 2^101990635 is an apocalyptic number.

101990635 is a deficient number, since it is larger than the sum of its proper divisors (20398133).

101990635 is an equidigital number, since it uses as much as digits as its factorization.

101990635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20398132.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 101990635 is about 10099.0412911325. The cubic root of 101990635 is about 467.2185729343.

The spelling of 101990635 in words is "one hundred one million, nine hundred ninety thousand, six hundred thirty-five".