405499487 has 4 divisors (see below), whose sum is σ = 429352416. Its totient is φ = 381646560.

The previous prime is 405499459. The next prime is 405499519. The reversal of 405499487 is 784994504.

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

It is a cyclic number.

It is not a de Polignac number, because 405499487 - 2¹⁴ = 405483103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405499447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11926439 + ... + 11926472.

It is an arithmetic number, because the mean of its divisors is an integer number (107338104).

Almost surely, 2^405499487 is an apocalyptic number.

405499487 is a deficient number, since it is larger than the sum of its proper divisors (23852929).

405499487 is a wasteful number, since it uses less digits than its factorization.

405499487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23852928.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 405499487 is about 20137.0178278711. The cubic root of 405499487 is about 740.1676555848.

The spelling of 405499487 in words is "four hundred five million, four hundred ninety-nine thousand, four hundred eighty-seven".