409778051 has 4 divisors (see below), whose sum is σ = 427594512. Its totient is φ = 391961592.

The previous prime is 409778041. The next prime is 409778063. The reversal of 409778051 is 150877904.

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-409778051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409778021) 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, 8908196 + ... + 8908241.

It is an arithmetic number, because the mean of its divisors is an integer number (106898628).

Almost surely, 2^409778051 is an apocalyptic number.

409778051 is a deficient number, since it is larger than the sum of its proper divisors (17816461).

409778051 is a wasteful number, since it uses less digits than its factorization.

409778051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17816460.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 409778051 is about 20242.9753494885. The cubic root of 409778051 is about 742.7618071037.

The spelling of 409778051 in words is "four hundred nine million, seven hundred seventy-eight thousand, fifty-one".