403487399 has 4 divisors (see below), whose sum is σ = 461128464. Its totient is φ = 345846336.

The previous prime is 403487347. The next prime is 403487407. The reversal of 403487399 is 993784304.

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 403487399 - 2⁸ = 403487143 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 (403487099) 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, 28820522 + ... + 28820535.

It is an arithmetic number, because the mean of its divisors is an integer number (115282116).

Almost surely, 2^403487399 is an apocalyptic number.

403487399 is a deficient number, since it is larger than the sum of its proper divisors (57641065).

403487399 is an equidigital number, since it uses as much as digits as its factorization.

403487399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57641064.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 403487399 is about 20086.9957684070. The cubic root of 403487399 is about 738.9413880709.

The spelling of 403487399 in words is "four hundred three million, four hundred eighty-seven thousand, three hundred ninety-nine".