101861537 has 2 divisors, whose sum is σ = 101861538. Its totient is φ = 101861536.

The previous prime is 101861509. The next prime is 101861579. The reversal of 101861537 is 735168101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58354321 + 43507216 = 7639^2 + 6596^2 .

It is a cyclic number.

It is not a de Polignac number, because 101861537 - 2¹⁴ = 101845153 is a prime.

It is not a weakly prime, because it can be changed into another prime (101861587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50930768 + 50930769.

It is an arithmetic number, because the mean of its divisors is an integer number (50930769).

Almost surely, 2^101861537 is an apocalyptic number.

It is an amenable number.

101861537 is a deficient number, since it is larger than the sum of its proper divisors (1).

101861537 is an equidigital number, since it uses as much as digits as its factorization.

101861537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 101861537 is about 10092.6476704579. The cubic root of 101861537 is about 467.0213572761.

The spelling of 101861537 in words is "one hundred one million, eight hundred sixty-one thousand, five hundred thirty-seven".