101981859 has 8 divisors (see below), whose sum is σ = 155400960. Its totient is φ = 58275336.

The previous prime is 101981857. The next prime is 101981863. The reversal of 101981859 is 958189101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101981859 - 2¹ = 101981857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101981859.

It is not an unprimeable number, because it can be changed into a prime (101981857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2428119 + ... + 2428160.

It is an arithmetic number, because the mean of its divisors is an integer number (19425120).

Almost surely, 2^101981859 is an apocalyptic number.

101981859 is a deficient number, since it is larger than the sum of its proper divisors (53419101).

101981859 is an equidigital number, since it uses as much as digits as its factorization.

101981859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4856289.

The product of its (nonzero) digits is 25920, while the sum is 42.

The square root of 101981859 is about 10098.6067850966. The cubic root of 101981859 is about 467.2051716130.

The spelling of 101981859 in words is "one hundred one million, nine hundred eighty-one thousand, eight hundred fifty-nine".