261292199 has 8 divisors (see below), whose sum is σ = 314336640. Its totient is φ = 212177016.

The previous prime is 261292177. The next prime is 261292201. The reversal of 261292199 is 991292162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261292199 is a prime.

It is a super-2 number, since 2×261292199² = 136547226516511202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261292099) 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 in 7 ways as a sum of consecutive naturals, for example, 982169 + ... + 982434.

It is an arithmetic number, because the mean of its divisors is an integer number (39292080).

Almost surely, 2^261292199 is an apocalyptic number.

261292199 is a deficient number, since it is larger than the sum of its proper divisors (53044441).

261292199 is a wasteful number, since it uses less digits than its factorization.

261292199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964629.

The product of its digits is 34992, while the sum is 41.

The square root of 261292199 is about 16164.5352237545. The cubic root of 261292199 is about 639.3060503966.

The spelling of 261292199 in words is "two hundred sixty-one million, two hundred ninety-two thousand, one hundred ninety-nine".