409978027 has 4 divisors (see below), whose sum is σ = 410234440. Its totient is φ = 409721616.

The previous prime is 409978003. The next prime is 409978033. The reversal of 409978027 is 720879904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409978027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409928027) 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, 125793 + ... + 129010.

It is an arithmetic number, because the mean of its divisors is an integer number (102558610).

Almost surely, 2^409978027 is an apocalyptic number.

409978027 is a deficient number, since it is larger than the sum of its proper divisors (256413).

409978027 is a wasteful number, since it uses less digits than its factorization.

409978027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256412.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 409978027 is about 20247.9141394861. The cubic root of 409978027 is about 742.8826126464.

The spelling of 409978027 in words is "four hundred nine million, nine hundred seventy-eight thousand, twenty-seven".