263500397 has 4 divisors (see below), whose sum is σ = 274956960. Its totient is φ = 252043836.

The previous prime is 263500381. The next prime is 263500427. The reversal of 263500397 is 793005362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 263500397 - 2⁴ = 263500381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263509397) 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 3 ways as a sum of consecutive naturals, for example, 5728247 + ... + 5728292.

It is an arithmetic number, because the mean of its divisors is an integer number (68739240).

Almost surely, 2^263500397 is an apocalyptic number.

It is an amenable number.

263500397 is a deficient number, since it is larger than the sum of its proper divisors (11456563).

263500397 is a wasteful number, since it uses less digits than its factorization.

263500397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456562.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 263500397 is about 16232.6953091592. The cubic root of 263500397 is about 641.1019403148.

The spelling of 263500397 in words is "two hundred sixty-three million, five hundred thousand, three hundred ninety-seven".