261379153 has 8 divisors (see below), whose sum is σ = 311707008. Its totient is φ = 214298304.

The previous prime is 261379123. The next prime is 261379159. The reversal of 261379153 is 351973162.

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

It is a cyclic number.

It is not a de Polignac number, because 261379153 - 2¹³ = 261370961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261379159) 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, 811576 + ... + 811897.

It is an arithmetic number, because the mean of its divisors is an integer number (38963376).

Almost surely, 2^261379153 is an apocalyptic number.

261379153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

261379153 is a deficient number, since it is larger than the sum of its proper divisors (50327855).

261379153 is a wasteful number, since it uses less digits than its factorization.

261379153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623503.

The product of its digits is 34020, while the sum is 37.

The square root of 261379153 is about 16167.2246536009. The cubic root of 261379153 is about 639.3769595845.

The spelling of 261379153 in words is "two hundred sixty-one million, three hundred seventy-nine thousand, one hundred fifty-three".