261030463 has 4 divisors (see below), whose sum is σ = 262908520. Its totient is φ = 259152408.

The previous prime is 261030437. The next prime is 261030481. The reversal of 261030463 is 364030162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261030463 - 2⁵ = 261030431 is a prime.

It is a super-2 number, since 2×261030463² = 136273805227988738, 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 (261034463) 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, 938820 + ... + 939097.

It is an arithmetic number, because the mean of its divisors is an integer number (65727130).

Almost surely, 2^261030463 is an apocalyptic number.

261030463 is a deficient number, since it is larger than the sum of its proper divisors (1878057).

261030463 is a wasteful number, since it uses less digits than its factorization.

261030463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878056.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 261030463 is about 16156.4372000760. The cubic root of 261030463 is about 639.0925151139.

The spelling of 261030463 in words is "two hundred sixty-one million, thirty thousand, four hundred sixty-three".