263939 has 8 divisors (see below), whose sum is σ = 288960. Its totient is φ = 239616.

The previous prime is 263933. The next prime is 263941. The reversal of 263939 is 939362.

263939 = T₃₉ + T₄₀ + ... + T₁₁₇.

263939 is nontrivially palindromic in base 6.

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

It is a de Polignac number, because none of the positive numbers 2^k-263939 is a prime.

It is a Duffinian number.

263939 is an undulating number in base 6.

263939 is a modest number, since divided by 3939 gives 26 as remainder.

It is not an unprimeable number, because it can be changed into a prime (263933) 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, 899 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (36120).

2²⁶³⁹³⁹ is an apocalyptic number.

263939 is a deficient number, since it is larger than the sum of its proper divisors (25021).

263939 is a wasteful number, since it uses less digits than its factorization.

263939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its digits is 8748, while the sum is 32.

The square root of 263939 is about 513.7499391727. The cubic root of 263939 is about 64.1457453205.

The spelling of 263939 in words is "two hundred sixty-three thousand, nine hundred thirty-nine".