261082297 has 4 divisors (see below), whose sum is σ = 298379776. Its totient is φ = 223784820.

The previous prime is 261082271. The next prime is 261082309. The reversal of 261082297 is 792280162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 792280162 = 2 ⋅396140081.

It is not a de Polignac number, because 261082297 - 2⁷ = 261082169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261082207) 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, 18648729 + ... + 18648742.

It is an arithmetic number, because the mean of its divisors is an integer number (74594944).

Almost surely, 2^261082297 is an apocalyptic number.

It is an amenable number.

261082297 is a deficient number, since it is larger than the sum of its proper divisors (37297479).

261082297 is an equidigital number, since it uses as much as digits as its factorization.

261082297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37297478.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 261082297 is about 16158.0412488643. The cubic root of 261082297 is about 639.1348148116.

The spelling of 261082297 in words is "two hundred sixty-one million, eighty-two thousand, two hundred ninety-seven".