123391801 has 12 divisors (see below), whose sum is σ = 134955180. Its totient is φ = 112756800.

The previous prime is 123391789. The next prime is 123391813. The reversal of 123391801 is 108193321.

It is an interprime number because it is at equal distance from previous prime (123391789) and next prime (123391813).

It can be written as a sum of positive squares in 6 ways, for example, as 8880400 + 114511401 = 2980^2 + 10701^2 .

It is not a de Polignac number, because 123391801 - 2¹³ = 123383609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123391801.

It is not an unprimeable number, because it can be changed into a prime (123391861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13455 + ... + 20683.

It is an arithmetic number, because the mean of its divisors is an integer number (11246265).

Almost surely, 2^123391801 is an apocalyptic number.

It is an amenable number.

123391801 is a deficient number, since it is larger than the sum of its proper divisors (11563379).

123391801 is a wasteful number, since it uses less digits than its factorization.

123391801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7356 (or 7343 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 123391801 is about 11108.1862155799. The cubic root of 123391801 is about 497.8464726228.

The spelling of 123391801 in words is "one hundred twenty-three million, three hundred ninety-one thousand, eight hundred one".