409681867 has 8 divisors (see below), whose sum is σ = 468991712. Its totient is φ = 350568000.

The previous prime is 409681849. The next prime is 409681873. The reversal of 409681867 is 768186904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 409681867 - 2¹¹ = 409679819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 409681867.

It is not an unprimeable number, because it can be changed into a prime (409681567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44484 + ... + 52897.

It is an arithmetic number, because the mean of its divisors is an integer number (58623964).

Almost surely, 2^409681867 is an apocalyptic number.

409681867 is a deficient number, since it is larger than the sum of its proper divisors (59309845).

409681867 is an equidigital number, since it uses as much as digits as its factorization.

409681867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97989.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 409681867 is about 20240.5994723477. The cubic root of 409681867 is about 742.7036883311.

It can be divided in two parts, 409 and 681867, that added together give a square (682276 = 826²).

The spelling of 409681867 in words is "four hundred nine million, six hundred eighty-one thousand, eight hundred sixty-seven".