261963793 has 8 divisors (see below), whose sum is σ = 322417088. Its totient is φ = 207267984.

The previous prime is 261963791. The next prime is 261963797. The reversal of 261963793 is 397369162.

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

It is not a de Polignac number, because 261963793 - 2¹ = 261963791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261963791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439271 + ... + 1439452.

It is an arithmetic number, because the mean of its divisors is an integer number (40302136).

Almost surely, 2^261963793 is an apocalyptic number.

It is an amenable number.

261963793 is a deficient number, since it is larger than the sum of its proper divisors (60453295).

261963793 is a wasteful number, since it uses less digits than its factorization.

261963793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878743.

The product of its digits is 367416, while the sum is 46.

The square root of 261963793 is about 16185.2955796303. The cubic root of 261963793 is about 639.8533135504.

The spelling of 261963793 in words is "two hundred sixty-one million, nine hundred sixty-three thousand, seven hundred ninety-three".