101406643 has 4 divisors (see below), whose sum is σ = 109207168. Its totient is φ = 93606120.

The previous prime is 101406623. The next prime is 101406647. The reversal of 101406643 is 346604101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346604101 = 863 ⋅401627.

It is a cyclic number.

It is not a de Polignac number, because 101406643 - 2⁹ = 101406131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101406647) 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, 3900243 + ... + 3900268.

It is an arithmetic number, because the mean of its divisors is an integer number (27301792).

Almost surely, 2^101406643 is an apocalyptic number.

101406643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

101406643 is a deficient number, since it is larger than the sum of its proper divisors (7800525).

101406643 is an equidigital number, since it uses as much as digits as its factorization.

101406643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800524.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 101406643 is about 10070.0865438188. The cubic root of 101406643 is about 466.3251106751.

The spelling of 101406643 in words is "one hundred one million, four hundred six thousand, six hundred forty-three".