403421087 has 2 divisors, whose sum is σ = 403421088. Its totient is φ = 403421086.

The previous prime is 403421063. The next prime is 403421089. The reversal of 403421087 is 780124304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 403421087 - 2¹² = 403416991 is a prime.

Together with 403421089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403421089) 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 as a sum of consecutive naturals, namely, 201710543 + 201710544.

It is an arithmetic number, because the mean of its divisors is an integer number (201710544).

Almost surely, 2^403421087 is an apocalyptic number.

403421087 is a deficient number, since it is larger than the sum of its proper divisors (1).

403421087 is an equidigital number, since it uses as much as digits as its factorization.

403421087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 403421087 is about 20085.3450804312. The cubic root of 403421087 is about 738.9009048852.

The spelling of 403421087 in words is "four hundred three million, four hundred twenty-one thousand, eighty-seven".