261103397 has 2 divisors, whose sum is σ = 261103398. Its totient is φ = 261103396.

The previous prime is 261103373. The next prime is 261103399. The reversal of 261103397 is 793301162.

It is a happy number.

261103397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259660996 + 1442401 = 16114^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 261103397 - 2¹² = 261099301 is a prime.

Together with 261103399, 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 (261103399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130551698 + 130551699.

It is an arithmetic number, because the mean of its divisors is an integer number (130551699).

Almost surely, 2^261103397 is an apocalyptic number.

It is an amenable number.

261103397 is a deficient number, since it is larger than the sum of its proper divisors (1).

261103397 is an equidigital number, since it uses as much as digits as its factorization.

261103397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 261103397 is about 16158.6941613486. The cubic root of 261103397 is about 639.1520320919.

The spelling of 261103397 in words is "two hundred sixty-one million, one hundred three thousand, three hundred ninety-seven".