399106049 has 4 divisors (see below), whose sum is σ = 399265536. Its totient is φ = 398946564.

The previous prime is 399106027. The next prime is 399106061. The reversal of 399106049 is 940601993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399106049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399105997 and 399106015.

It is not an unprimeable number, because it can be changed into a prime (399106249) 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, 75929 + ... + 81014.

It is an arithmetic number, because the mean of its divisors is an integer number (99816384).

Almost surely, 2^399106049 is an apocalyptic number.

It is an amenable number.

399106049 is a deficient number, since it is larger than the sum of its proper divisors (159487).

399106049 is a wasteful number, since it uses less digits than its factorization.

399106049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159486.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 399106049 is about 19977.6387243338. The cubic root of 399106049 is about 736.2569997115.

The spelling of 399106049 in words is "three hundred ninety-nine million, one hundred six thousand, forty-nine".