261073039 has 6 divisors (see below), whose sum is σ = 264703776. Its totient is φ = 257491440.

The previous prime is 261073037. The next prime is 261073079. The reversal of 261073039 is 930370162.

It is not a de Polignac number, because 261073039 - 2¹ = 261073037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261073039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261073031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19167 + ... + 29824.

It is an arithmetic number, because the mean of its divisors is an integer number (44117296).

Almost surely, 2^261073039 is an apocalyptic number.

261073039 is a deficient number, since it is larger than the sum of its proper divisors (3630737).

261073039 is an frugal number, since it uses more digits than its factorization.

261073039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49137 (or 49064 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 261073039 is about 16157.7547635802. The cubic root of 261073039 is about 639.1272601310.

The spelling of 261073039 in words is "two hundred sixty-one million, seventy-three thousand, thirty-nine".