101173561 has 2 divisors, whose sum is σ = 101173562. Its totient is φ = 101173560.

The previous prime is 101173549. The next prime is 101173621. The reversal of 101173561 is 165371101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96138025 + 5035536 = 9805^2 + 2244^2 .

It is a cyclic number.

It is not a de Polignac number, because 101173561 - 2⁷ = 101173433 is a prime.

It is not a weakly prime, because it can be changed into another prime (101173361) 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, 50586780 + 50586781.

It is an arithmetic number, because the mean of its divisors is an integer number (50586781).

Almost surely, 2^101173561 is an apocalyptic number.

It is an amenable number.

101173561 is a deficient number, since it is larger than the sum of its proper divisors (1).

101173561 is an equidigital number, since it uses as much as digits as its factorization.

101173561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 101173561 is about 10058.5068971493. The cubic root of 101173561 is about 465.9675556258.

The spelling of 101173561 in words is "one hundred one million, one hundred seventy-three thousand, five hundred sixty-one".