261235379 has 4 divisors (see below), whose sum is σ = 276602184. Its totient is φ = 245868576.

The previous prime is 261235369. The next prime is 261235397. The reversal of 261235379 is 973532162.

261235379 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 an emirpimes, since its reverse is a distinct semiprime: 973532162 = 2 ⋅486766081.

It is a cyclic number.

It is not a de Polignac number, because 261235379 - 2¹² = 261231283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261235369) 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, 7683377 + ... + 7683410.

It is an arithmetic number, because the mean of its divisors is an integer number (69150546).

Almost surely, 2^261235379 is an apocalyptic number.

261235379 is a deficient number, since it is larger than the sum of its proper divisors (15366805).

261235379 is a wasteful number, since it uses less digits than its factorization.

261235379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15366804.

The product of its digits is 68040, while the sum is 38.

The square root of 261235379 is about 16162.7775768894. Note that the first 3 decimals coincide. The cubic root of 261235379 is about 639.2597063632.

The spelling of 261235379 in words is "two hundred sixty-one million, two hundred thirty-five thousand, three hundred seventy-nine".