263691049 has 8 divisors (see below), whose sum is σ = 270371808. Its totient is φ = 257022240.

The previous prime is 263691017. The next prime is 263691091. The reversal of 263691049 is 940196362.

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 263691049 - 2⁵ = 263691017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263691749) 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, 56254 + ... + 60760.

It is an arithmetic number, because the mean of its divisors is an integer number (33796476).

Almost surely, 2^263691049 is an apocalyptic number.

It is an amenable number.

263691049 is a deficient number, since it is larger than the sum of its proper divisors (6680759).

263691049 is a wasteful number, since it uses less digits than its factorization.

263691049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5975.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 263691049 is about 16238.5667163084. The cubic root of 263691049 is about 641.2565231310.

The spelling of 263691049 in words is "two hundred sixty-three million, six hundred ninety-one thousand, forty-nine".