261099283 has 2 divisors, whose sum is σ = 261099284. Its totient is φ = 261099282.

The previous prime is 261099281. The next prime is 261099301. The reversal of 261099283 is 382990162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261099283 - 2¹ = 261099281 is a prime.

It is a super-2 number, since 2×261099283² = 136345671166228178, which contains 22 as substring.

Together with 261099281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (261099281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130549641 + 130549642.

It is an arithmetic number, because the mean of its divisors is an integer number (130549642).

Almost surely, 2^261099283 is an apocalyptic number.

261099283 is a deficient number, since it is larger than the sum of its proper divisors (1).

261099283 is an equidigital number, since it uses as much as digits as its factorization.

261099283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 261099283 is about 16158.5668609565. The cubic root of 261099283 is about 639.1486752030.

The spelling of 261099283 in words is "two hundred sixty-one million, ninety-nine thousand, two hundred eighty-three".