409253693 has 4 divisors (see below), whose sum is σ = 409320828. Its totient is φ = 409186560.

The previous prime is 409253687. The next prime is 409253729. The reversal of 409253693 is 396352904.

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 86620249 + 322633444 = 9307^2 + 17962^2 .

It is a cyclic number.

It is not a de Polignac number, because 409253693 - 2⁶ = 409253629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409253693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409253623) 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, 23396 + ... + 36957.

It is an arithmetic number, because the mean of its divisors is an integer number (102330207).

Almost surely, 2^409253693 is an apocalyptic number.

It is an amenable number.

409253693 is a deficient number, since it is larger than the sum of its proper divisors (67135).

409253693 is an equidigital number, since it uses as much as digits as its factorization.

409253693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67134.

The product of its (nonzero) digits is 174960, while the sum is 41.

The square root of 409253693 is about 20230.0195995951. The cubic root of 409253693 is about 742.4448555750. Note that the first 3 decimals are identical.

The spelling of 409253693 in words is "four hundred nine million, two hundred fifty-three thousand, six hundred ninety-three".