101209923 has 6 divisors (see below), whose sum is σ = 146192124. Its totient is φ = 67473276.

The previous prime is 101209921. The next prime is 101209937. The reversal of 101209923 is 329902101.

It is not a de Polignac number, because 101209923 - 2¹ = 101209921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101209921) 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 5 ways as a sum of consecutive naturals, for example, 5622765 + ... + 5622782.

It is an arithmetic number, because the mean of its divisors is an integer number (24365354).

Almost surely, 2^101209923 is an apocalyptic number.

101209923 is a deficient number, since it is larger than the sum of its proper divisors (44982201).

101209923 is a wasteful number, since it uses less digits than its factorization.

101209923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11245553 (or 11245550 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 101209923 is about 10060.3142595050. The cubic root of 101209923 is about 466.0233721937.

The spelling of 101209923 in words is "one hundred one million, two hundred nine thousand, nine hundred twenty-three".