395612099 has 4 divisors (see below), whose sum is σ = 395651880. Its totient is φ = 395572320.

The previous prime is 395612089. The next prime is 395612137. The reversal of 395612099 is 990216593.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 990216593 = 7649 ⋅129457.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395612099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395612059) 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, 9944 + ... + 29834.

It is an arithmetic number, because the mean of its divisors is an integer number (98912970).

Almost surely, 2^395612099 is an apocalyptic number.

395612099 is a deficient number, since it is larger than the sum of its proper divisors (39781).

395612099 is a wasteful number, since it uses less digits than its factorization.

395612099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39780.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 395612099 is about 19889.9999748617. Note that the first 4 decimals coincide. The cubic root of 395612099 is about 734.1021934496.

The spelling of 395612099 in words is "three hundred ninety-five million, six hundred twelve thousand, ninety-nine".