100399601 has 4 divisors (see below), whose sum is σ = 101775012. Its totient is φ = 99024192.

The previous prime is 100399589. The next prime is 100399613. The reversal of 100399601 is 106993001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (100399589) and next prime (100399613).

It can be written as a sum of positive squares in 2 ways, for example, as 84198976 + 16200625 = 9176^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 100399601 - 2²⁶ = 33290737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100399631) 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, 687596 + ... + 687741.

It is an arithmetic number, because the mean of its divisors is an integer number (25443753).

Almost surely, 2^100399601 is an apocalyptic number.

It is an amenable number.

100399601 is a deficient number, since it is larger than the sum of its proper divisors (1375411).

100399601 is an equidigital number, since it uses as much as digits as its factorization.

100399601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375410.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 100399601 is about 10019.9601296612. The cubic root of 100399601 is about 464.7763228385.

The spelling of 100399601 in words is "one hundred million, three hundred ninety-nine thousand, six hundred one".