123997801 has 4 divisors (see below), whose sum is σ = 125225604. Its totient is φ = 122770000.

The previous prime is 123997759. The next prime is 123997829. The reversal of 123997801 is 108799321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108799321 = 101 ⋅1077221.

It can be written as a sum of positive squares in 2 ways, for example, as 114511401 + 9486400 = 10701^2 + 3080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123997801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123997831) 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 in 3 ways as a sum of consecutive naturals, for example, 613750 + ... + 613951.

It is an arithmetic number, because the mean of its divisors is an integer number (31306401).

Almost surely, 2^123997801 is an apocalyptic number.

It is an amenable number.

123997801 is a deficient number, since it is larger than the sum of its proper divisors (1227803).

123997801 is a wasteful number, since it uses less digits than its factorization.

123997801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227802.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 123997801 is about 11135.4299872075. The cubic root of 123997801 is about 498.6601474641.

The spelling of 123997801 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, eight hundred one".