101997138 has 8 divisors (see below), whose sum is σ = 203994288. Its totient is φ = 33999044.

The previous prime is 101997131. The next prime is 101997151. The reversal of 101997138 is 831799101.

It is a sphenic number, since it is the product of 3 distinct primes.

101997138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 101997096 and 101997105.

It is not an unprimeable number, because it can be changed into a prime (101997131) 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 3 ways as a sum of consecutive naturals, for example, 8499756 + ... + 8499767.

It is an arithmetic number, because the mean of its divisors is an integer number (25499286).

Almost surely, 2^101997138 is an apocalyptic number.

101997138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101997138 is a wasteful number, since it uses less digits than its factorization.

101997138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999528.

The product of its (nonzero) digits is 13608, while the sum is 39.

The square root of 101997138 is about 10099.3632472547. The cubic root of 101997138 is about 467.2285027931.

The spelling of 101997138 in words is "one hundred one million, nine hundred ninety-seven thousand, one hundred thirty-eight".