403421287 has 6 divisors (see below), whose sum is σ = 409028712. Its totient is φ = 397889712.

The previous prime is 403421279. The next prime is 403421299. The reversal of 403421287 is 782124304.

It is not a de Polignac number, because 403421287 - 2³ = 403421279 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 (403421267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32523 + ... + 43180.

It is an arithmetic number, because the mean of its divisors is an integer number (68171452).

Almost surely, 2^403421287 is an apocalyptic number.

403421287 is a deficient number, since it is larger than the sum of its proper divisors (5607425).

403421287 is an frugal number, since it uses more digits than its factorization.

403421287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75849 (or 75776 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 403421287 is about 20085.3500591849. The cubic root of 403421287 is about 738.9010269910.

The spelling of 403421287 in words is "four hundred three million, four hundred twenty-one thousand, two hundred eighty-seven".