123699001 has 4 divisors (see below), whose sum is σ = 124230132. Its totient is φ = 123167872.

The previous prime is 123698999. The next prime is 123699031. The reversal of 123699001 is 100996321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100996321 = 193 ⋅523297.

It can be written as a sum of positive squares in 2 ways, for example, as 41615401 + 82083600 = 6451^2 + 9060^2 .

It is a cyclic number.

It is not a de Polignac number, because 123699001 - 2¹ = 123698999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123699031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265216 + ... + 265681.

It is an arithmetic number, because the mean of its divisors is an integer number (31057533).

Almost surely, 2^123699001 is an apocalyptic number.

It is an amenable number.

123699001 is a deficient number, since it is larger than the sum of its proper divisors (531131).

123699001 is an equidigital number, since it uses as much as digits as its factorization.

123699001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531130.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 123699001 is about 11122.0052598441. The cubic root of 123699001 is about 498.2592814976.

The spelling of 123699001 in words is "one hundred twenty-three million, six hundred ninety-nine thousand, one".