101861787 has 6 divisors (see below), whose sum is σ = 135839028. Its totient is φ = 67896204.

The previous prime is 101861759. The next prime is 101861819. The reversal of 101861787 is 787168101.

It is not a de Polignac number, because 101861787 - 2¹¹ = 101859739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101861087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14568 + ... + 20394.

It is an arithmetic number, because the mean of its divisors is an integer number (22639838).

Almost surely, 2^101861787 is an apocalyptic number.

101861787 is a deficient number, since it is larger than the sum of its proper divisors (33977241).

101861787 is an frugal number, since it uses more digits than its factorization.

101861787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11657 (or 5830 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 39.

The square root of 101861787 is about 10092.6600557038. The cubic root of 101861787 is about 467.0217393478.

The spelling of 101861787 in words is "one hundred one million, eight hundred sixty-one thousand, seven hundred eighty-seven".