101638972 has 12 divisors (see below), whose sum is σ = 178022880. Its totient is φ = 50775296.

The previous prime is 101638969. The next prime is 101638973. The reversal of 101638972 is 279836101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101638973) 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, 5572 + ... + 15307.

It is an arithmetic number, because the mean of its divisors is an integer number (14835240).

Almost surely, 2^101638972 is an apocalyptic number.

It is an amenable number.

101638972 is a deficient number, since it is larger than the sum of its proper divisors (76383908).

101638972 is a wasteful number, since it uses less digits than its factorization.

101638972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100 (or 22098 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 101638972 is about 10081.6155451396. The cubic root of 101638972 is about 466.6809657750.

The spelling of 101638972 in words is "one hundred one million, six hundred thirty-eight thousand, nine hundred seventy-two".