3261994397 has 2 divisors, whose sum is σ = 3261994398. Its totient is φ = 3261994396.

The previous prime is 3261994369. The next prime is 3261994427. The reversal of 3261994397 is 7934991623.

It is a happy number.

3261994397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3261437881 + 556516 = 57109^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261994397 - 2²⁸ = 2993558941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261994367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630997198 + 1630997199.

It is an arithmetic number, because the mean of its divisors is an integer number (1630997199).

Almost surely, 2^3261994397 is an apocalyptic number.

It is an amenable number.

3261994397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261994397 is an equidigital number, since it uses as much as digits as its factorization.

3261994397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 3261994397 is about 57113.8721940651. The cubic root of 3261994397 is about 1483.0680203792.

The spelling of 3261994397 in words is "three billion, two hundred sixty-one million, nine hundred ninety-four thousand, three hundred ninety-seven".