101654989 has 2 divisors, whose sum is σ = 101654990. Its totient is φ = 101654988.

The previous prime is 101654981. The next prime is 101655041. The reversal of 101654989 is 989456101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78180964 + 23474025 = 8842^2 + 4845^2 .

It is a cyclic number.

It is not a de Polignac number, because 101654989 - 2³ = 101654981 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101654981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50827494 + 50827495.

It is an arithmetic number, because the mean of its divisors is an integer number (50827495).

Almost surely, 2^101654989 is an apocalyptic number.

It is an amenable number.

101654989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101654989 is an equidigital number, since it uses as much as digits as its factorization.

101654989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 101654989 is about 10082.4098805791. The cubic root of 101654989 is about 466.7054788014.

The spelling of 101654989 in words is "one hundred one million, six hundred fifty-four thousand, nine hundred eighty-nine".