404029487 has 2 divisors, whose sum is σ = 404029488. Its totient is φ = 404029486.

The previous prime is 404029427. The next prime is 404029489. The reversal of 404029487 is 784920404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404029487 - 2²⁰ = 402980911 is a prime.

Together with 404029489, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404029487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404029489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202014743 + 202014744.

It is an arithmetic number, because the mean of its divisors is an integer number (202014744).

Almost surely, 2^404029487 is an apocalyptic number.

404029487 is a deficient number, since it is larger than the sum of its proper divisors (1).

404029487 is an equidigital number, since it uses as much as digits as its factorization.

404029487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 404029487 is about 20100.4847453986. The cubic root of 404029487 is about 739.2721642024.

The spelling of 404029487 in words is "four hundred four million, twenty-nine thousand, four hundred eighty-seven".