3217139903 has 4 divisors (see below), whose sum is σ = 3217633440. Its totient is φ = 3216646368.

The previous prime is 3217139897. The next prime is 3217139921. The reversal of 3217139903 is 3099317123.

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 3217139903 - 2⁸ = 3217139647 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 (3217139963) 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, 236858 + ... + 250071.

It is an arithmetic number, because the mean of its divisors is an integer number (804408360).

Almost surely, 2^3217139903 is an apocalyptic number.

3217139903 is a deficient number, since it is larger than the sum of its proper divisors (493537).

3217139903 is an equidigital number, since it uses as much as digits as its factorization.

3217139903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493536.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 3217139903 is about 56719.8369444060. The cubic root of 3217139903 is about 1476.2389135896.

The spelling of 3217139903 in words is "three billion, two hundred seventeen million, one hundred thirty-nine thousand, nine hundred three".