101748989 has 2 divisors, whose sum is σ = 101748990. Its totient is φ = 101748988.

The previous prime is 101748931. The next prime is 101748991. The reversal of 101748989 is 989847101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72965764 + 28783225 = 8542^2 + 5365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101748989 is a prime.

It is a Sophie Germain prime.

Together with 101748991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101048989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50874494 + 50874495.

It is an arithmetic number, because the mean of its divisors is an integer number (50874495).

Almost surely, 2^101748989 is an apocalyptic number.

It is an amenable number.

101748989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101748989 is an equidigital number, since it uses as much as digits as its factorization.

101748989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 101748989 is about 10087.0703873821. The cubic root of 101748989 is about 466.8492881056.

The spelling of 101748989 in words is "one hundred one million, seven hundred forty-eight thousand, nine hundred eighty-nine".