101994859 has 2 divisors, whose sum is σ = 101994860. Its totient is φ = 101994858.

The previous prime is 101994853. The next prime is 101994887. The reversal of 101994859 is 958499101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101994859 - 2⁷ = 101994731 is a prime.

It is not a weakly prime, because it can be changed into another prime (101994853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50997429 + 50997430.

It is an arithmetic number, because the mean of its divisors is an integer number (50997430).

Almost surely, 2^101994859 is an apocalyptic number.

101994859 is a deficient number, since it is larger than the sum of its proper divisors (1).

101994859 is an equidigital number, since it uses as much as digits as its factorization.

101994859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 46.

The square root of 101994859 is about 10099.2504177290. The cubic root of 101994859 is about 467.2250228860.

The spelling of 101994859 in words is "one hundred one million, nine hundred ninety-four thousand, eight hundred fifty-nine".