101638965 has 8 divisors (see below), whose sum is σ = 162622368. Its totient is φ = 54207440.

The previous prime is 101638949. The next prime is 101638967. The reversal of 101638965 is 569836101.

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

It is not a de Polignac number, because 101638965 - 2⁴ = 101638949 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101638967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3387951 + ... + 3387980.

It is an arithmetic number, because the mean of its divisors is an integer number (20327796).

Almost surely, 2^101638965 is an apocalyptic number.

101638965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101638965 is a deficient number, since it is larger than the sum of its proper divisors (60983403).

101638965 is an equidigital number, since it uses as much as digits as its factorization.

101638965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775939.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 101638965 is about 10081.6151979730. The cubic root of 101638965 is about 466.6809550614.

The spelling of 101638965 in words is "one hundred one million, six hundred thirty-eight thousand, nine hundred sixty-five".