395612101 has 4 divisors (see below), whose sum is σ = 395901612. Its totient is φ = 395322592.

The previous prime is 395612089. The next prime is 395612137. The reversal of 395612101 is 101216593.

It is a Cunningham number, because it is equal to 19890²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 391011076 + 4601025 = 19774^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 395612101 - 2²³ = 387223493 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 395612101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395612401) 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, 142696 + ... + 145441.

It is an arithmetic number, because the mean of its divisors is an integer number (98975403).

Almost surely, 2^395612101 is an apocalyptic number.

It is an amenable number.

395612101 is a deficient number, since it is larger than the sum of its proper divisors (289511).

395612101 is a wasteful number, since it uses less digits than its factorization.

395612101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289510.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 395612101 is about 19890.0000251383. Note that the first 4 decimals coincide. The cubic root of 395612101 is about 734.1021946866.

Adding to 395612101 its reverse (101216593), we get a palindrome (496828694).

The spelling of 395612101 in words is "three hundred ninety-five million, six hundred twelve thousand, one hundred one".