101972644 has 6 divisors (see below), whose sum is σ = 178452134. Its totient is φ = 50986320.

The previous prime is 101972623. The next prime is 101972653. The reversal of 101972644 is 446279101.

It can be written as a sum of positive squares in only one way, i.e., 98247744 + 3724900 = 9912^2 + 1930^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12746577 + ... + 12746584.

Almost surely, 2^101972644 is an apocalyptic number.

It is an amenable number.

101972644 is a deficient number, since it is larger than the sum of its proper divisors (76479490).

101972644 is a wasteful number, since it uses less digits than its factorization.

101972644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25493165 (or 25493163 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 101972644 is about 10098.1505237345. The cubic root of 101972644 is about 467.1910990927.

The spelling of 101972644 in words is "one hundred one million, nine hundred seventy-two thousand, six hundred forty-four".