3216403 has 2 divisors, whose sum is σ = 3216404. Its totient is φ = 3216402.

The previous prime is 3216359. The next prime is 3216407. The reversal of 3216403 is 3046123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3216403 - 2¹³ = 3208211 is a prime.

It is not a weakly prime, because it can be changed into another prime (3216407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608201 + 1608202.

It is an arithmetic number, because the mean of its divisors is an integer number (1608202).

Almost surely, 2^3216403 is an apocalyptic number.

3216403 is a deficient number, since it is larger than the sum of its proper divisors (1).

3216403 is an equidigital number, since it uses as much as digits as its factorization.

3216403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 3216403 is about 1793.4332995682. The cubic root of 3216403 is about 147.6126191525.

It can be divided in two parts, 321 and 6403, that added together give a square (6724 = 82²).

The spelling of 3216403 in words is "three million, two hundred sixteen thousand, four hundred three".