123870001 has 2 divisors, whose sum is σ = 123870002. Its totient is φ = 123870000.

The previous prime is 123869983. The next prime is 123870031. The reversal of 123870001 is 100078321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 15397776 = 10415^2 + 3924^2 .

It is a cyclic number.

It is not a de Polignac number, because 123870001 - 2⁹ = 123869489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123870031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61935000 + 61935001.

It is an arithmetic number, because the mean of its divisors is an integer number (61935001).

Almost surely, 2^123870001 is an apocalyptic number.

It is an amenable number.

123870001 is a deficient number, since it is larger than the sum of its proper divisors (1).

123870001 is an equidigital number, since it uses as much as digits as its factorization.

123870001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 123870001 is about 11129.6900675625. The cubic root of 123870001 is about 498.4887716462.

The spelling of 123870001 in words is "one hundred twenty-three million, eight hundred seventy thousand, one".