3209085431 has 2 divisors, whose sum is σ = 3209085432. Its totient is φ = 3209085430.

The previous prime is 3209085421. The next prime is 3209085437. The reversal of 3209085431 is 1345809023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3209085431 - 2⁶ = 3209085367 is a prime.

It is a super-2 number, since 2×3209085431² = 20596458606912911522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3209085391 and 3209085400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3209085437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1604542715 + 1604542716.

It is an arithmetic number, because the mean of its divisors is an integer number (1604542716).

Almost surely, 2^3209085431 is an apocalyptic number.

3209085431 is a deficient number, since it is larger than the sum of its proper divisors (1).

3209085431 is an equidigital number, since it uses as much as digits as its factorization.

3209085431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3209085431 is about 56648.7901989089. The cubic root of 3209085431 is about 1475.0059072444.

The spelling of 3209085431 in words is "three billion, two hundred nine million, eighty-five thousand, four hundred thirty-one".