405328897 has 4 divisors (see below), whose sum is σ = 407068740. Its totient is φ = 403589056.

The previous prime is 405328883. The next prime is 405328921. The reversal of 405328897 is 798823504.

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 108076816 + 297252081 = 10396^2 + 17241^2 .

It is a cyclic number.

It is not a de Polignac number, because 405328897 - 2²³ = 396940289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405328867) 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, 869572 + ... + 870037.

It is an arithmetic number, because the mean of its divisors is an integer number (101767185).

Almost surely, 2^405328897 is an apocalyptic number.

It is an amenable number.

405328897 is a deficient number, since it is larger than the sum of its proper divisors (1739843).

405328897 is a wasteful number, since it uses less digits than its factorization.

405328897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739842.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 405328897 is about 20132.7816508301. The cubic root of 405328897 is about 740.0638470599.

The spelling of 405328897 in words is "four hundred five million, three hundred twenty-eight thousand, eight hundred ninety-seven".