101989453 has 4 divisors (see below), whose sum is σ = 102256128. Its totient is φ = 101722780.

The previous prime is 101989439. The next prime is 101989463. The reversal of 101989453 is 354989101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101989453 - 2¹⁷ = 101858381 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101989403) 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, 132763 + ... + 133528.

It is an arithmetic number, because the mean of its divisors is an integer number (25564032).

Almost surely, 2^101989453 is an apocalyptic number.

It is an amenable number.

101989453 is a deficient number, since it is larger than the sum of its proper divisors (266675).

101989453 is an equidigital number, since it uses as much as digits as its factorization.

101989453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266674.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 101989453 is about 10098.9827705566. The cubic root of 101989453 is about 467.2167680154.

The spelling of 101989453 in words is "one hundred one million, nine hundred eighty-nine thousand, four hundred fifty-three".