101040643 has 4 divisors (see below), whose sum is σ = 110226168. Its totient is φ = 91855120.

The previous prime is 101040619. The next prime is 101040659. The reversal of 101040643 is 346040101.

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: 346040101 = 11 ⋅31458191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101040643 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 101040643.

It is not an unprimeable number, because it can be changed into a prime (101040143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4592746 + ... + 4592767.

It is an arithmetic number, because the mean of its divisors is an integer number (27556542).

Almost surely, 2^101040643 is an apocalyptic number.

101040643 is a deficient number, since it is larger than the sum of its proper divisors (9185525).

101040643 is an equidigital number, since it uses as much as digits as its factorization.

101040643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9185524.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 101040643 is about 10051.8974825652. The cubic root of 101040643 is about 465.7634093463.

Adding to 101040643 its reverse (346040101), we get a palindrome (447080744).

The spelling of 101040643 in words is "one hundred one million, forty thousand, six hundred forty-three".