261413999 has 16 divisors (see below), whose sum is σ = 326716416. Its totient is φ = 203200800.

The previous prime is 261413987. The next prime is 261414001. The reversal of 261413999 is 999314162.

It is a happy number.

It is not a de Polignac number, because 261413999 - 2⁴ = 261413983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261413599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29249 + ... + 37125.

It is an arithmetic number, because the mean of its divisors is an integer number (20419776).

Almost surely, 2^261413999 is an apocalyptic number.

261413999 is a deficient number, since it is larger than the sum of its proper divisors (65302417).

261413999 is a wasteful number, since it uses less digits than its factorization.

261413999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326.

The product of its digits is 104976, while the sum is 44.

The square root of 261413999 is about 16168.3022918301. The cubic root of 261413999 is about 639.4053713627.

The spelling of 261413999 in words is "two hundred sixty-one million, four hundred thirteen thousand, nine hundred ninety-nine".