101861587 has 2 divisors, whose sum is σ = 101861588. Its totient is φ = 101861586.

The previous prime is 101861579. The next prime is 101861621. The reversal of 101861587 is 785168101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101861587 - 2³ = 101861579 is a prime.

It is not a weakly prime, because it can be changed into another prime (101861537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50930793 + 50930794.

It is an arithmetic number, because the mean of its divisors is an integer number (50930794).

Almost surely, 2^101861587 is an apocalyptic number.

101861587 is a deficient number, since it is larger than the sum of its proper divisors (1).

101861587 is an equidigital number, since it uses as much as digits as its factorization.

101861587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 37.

The square root of 101861587 is about 10092.6501475083. The cubic root of 101861587 is about 467.0214336905.

The spelling of 101861587 in words is "one hundred one million, eight hundred sixty-one thousand, five hundred eighty-seven".