261450199 has 2 divisors, whose sum is σ = 261450200. Its totient is φ = 261450198.

The previous prime is 261450169. The next prime is 261450221. The reversal of 261450199 is 991054162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261450199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261450149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130725099 + 130725100.

It is an arithmetic number, because the mean of its divisors is an integer number (130725100).

Almost surely, 2^261450199 is an apocalyptic number.

261450199 is a deficient number, since it is larger than the sum of its proper divisors (1).

261450199 is an equidigital number, since it uses as much as digits as its factorization.

261450199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 261450199 is about 16169.4217274459. The cubic root of 261450199 is about 639.4348844546.

The spelling of 261450199 in words is "two hundred sixty-one million, four hundred fifty thousand, one hundred ninety-nine".