261473473 has 4 divisors (see below), whose sum is σ = 261588928. Its totient is φ = 261358020.

The previous prime is 261473467. The next prime is 261473479. The reversal of 261473473 is 374374162.

261473473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (261473467) and next prime (261473479).

It is a cyclic number.

It is not a de Polignac number, because 261473473 - 2¹⁷ = 261342401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261473479) 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, 54261 + ... + 58882.

It is an arithmetic number, because the mean of its divisors is an integer number (65397232).

Almost surely, 2^261473473 is an apocalyptic number.

It is an amenable number.

261473473 is a deficient number, since it is larger than the sum of its proper divisors (115455).

261473473 is a wasteful number, since it uses less digits than its factorization.

261473473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115454.

The product of its digits is 84672, while the sum is 37.

The square root of 261473473 is about 16170.1414032160. The cubic root of 261473473 is about 639.4538578141.

The spelling of 261473473 in words is "two hundred sixty-one million, four hundred seventy-three thousand, four hundred seventy-three".