409870745 has 4 divisors (see below), whose sum is σ = 491844900. Its totient is φ = 327896592.

The previous prime is 409870733. The next prime is 409870753. The reversal of 409870745 is 547078904.

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 227647744 + 182223001 = 15088^2 + 13499^2 .

It is a cyclic number.

It is not a de Polignac number, because 409870745 - 2⁴ = 409870729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 409870696 and 409870705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40987070 + ... + 40987079.

It is an arithmetic number, because the mean of its divisors is an integer number (122961225).

Almost surely, 2^409870745 is an apocalyptic number.

It is an amenable number.

409870745 is a deficient number, since it is larger than the sum of its proper divisors (81974155).

409870745 is an equidigital number, since it uses as much as digits as its factorization.

409870745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81974154.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 409870745 is about 20245.2647549989. The cubic root of 409870745 is about 742.8178084537.

The spelling of 409870745 in words is "four hundred nine million, eight hundred seventy thousand, seven hundred forty-five".