398612101 has 4 divisors (see below), whose sum is σ = 401287500. Its totient is φ = 395936704.

The previous prime is 398612059. The next prime is 398612119. The reversal of 398612101 is 101216893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101216893 = 463 ⋅218611.

It can be written as a sum of positive squares in 2 ways, for example, as 13432225 + 385179876 = 3665^2 + 19626^2 .

It is a cyclic number.

It is not a de Polignac number, because 398612101 - 2¹¹ = 398610053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398612131) 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, 1337476 + ... + 1337773.

It is an arithmetic number, because the mean of its divisors is an integer number (100321875).

Almost surely, 2^398612101 is an apocalyptic number.

It is an amenable number.

398612101 is a deficient number, since it is larger than the sum of its proper divisors (2675399).

398612101 is a wasteful number, since it uses less digits than its factorization.

398612101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675398.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 398612101 is about 19965.2723748012. The cubic root of 398612101 is about 735.9531349383.

Adding to 398612101 its reverse (101216893), we get a palindrome (499828994).

The spelling of 398612101 in words is "three hundred ninety-eight million, six hundred twelve thousand, one hundred one".