123817801 has 2 divisors, whose sum is σ = 123817802. Its totient is φ = 123817800.

The previous prime is 123817753. The next prime is 123817843. The reversal of 123817801 is 108718321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 274576 = 11115^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 123817801 - 2¹⁵ = 123785033 is a prime.

It is not a weakly prime, because it can be changed into another prime (123817301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61908900 + 61908901.

It is an arithmetic number, because the mean of its divisors is an integer number (61908901).

Almost surely, 2^123817801 is an apocalyptic number.

It is an amenable number.

123817801 is a deficient number, since it is larger than the sum of its proper divisors (1).

123817801 is an equidigital number, since it uses as much as digits as its factorization.

123817801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 123817801 is about 11127.3447416713. The cubic root of 123817801 is about 498.4187391667.

The spelling of 123817801 in words is "one hundred twenty-three million, eight hundred seventeen thousand, eight hundred one".