409782057 has 4 divisors (see below), whose sum is σ = 546376080. Its totient is φ = 273188036.

The previous prime is 409782031. The next prime is 409782083. The reversal of 409782057 is 750287904.

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 an interprime number because it is at equal distance from previous prime (409782031) and next prime (409782083).

It is a cyclic number.

It is not a de Polignac number, because 409782057 - 2¹¹ = 409780009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409782097) 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, 68297007 + ... + 68297012.

It is an arithmetic number, because the mean of its divisors is an integer number (136594020).

Almost surely, 2^409782057 is an apocalyptic number.

It is an amenable number.

409782057 is a deficient number, since it is larger than the sum of its proper divisors (136594023).

409782057 is a wasteful number, since it uses less digits than its factorization.

409782057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136594022.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 409782057 is about 20243.0742971516. The cubic root of 409782057 is about 742.7642275148.

The spelling of 409782057 in words is "four hundred nine million, seven hundred eighty-two thousand, fifty-seven".