405706379 has 4 divisors (see below), whose sum is σ = 436914576. Its totient is φ = 374498184.

The previous prime is 405706351. The next prime is 405706403. The reversal of 405706379 is 973607504.

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

It is a cyclic number.

It is not a de Polignac number, because 405706379 - 2⁸ = 405706123 is a prime.

It is a super-2 number, since 2×405706379² = 329195331922583282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405706079) 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, 15604079 + ... + 15604104.

It is an arithmetic number, because the mean of its divisors is an integer number (109228644).

Almost surely, 2^405706379 is an apocalyptic number.

405706379 is a deficient number, since it is larger than the sum of its proper divisors (31208197).

405706379 is a wasteful number, since it uses less digits than its factorization.

405706379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31208196.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 405706379 is about 20142.1542790239. The cubic root of 405706379 is about 740.2935157769.

The spelling of 405706379 in words is "four hundred five million, seven hundred six thousand, three hundred seventy-nine".