263629145 has 8 divisors (see below), whose sum is σ = 340690056. Its totient is φ = 194679936.

The previous prime is 263629141. The next prime is 263629153. The reversal of 263629145 is 541926362.

It can be written as a sum of positive squares in 4 ways, for example, as 151321 + 263477824 = 389^2 + 16232^2 .

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 263629145 - 2² = 263629141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263629099 and 263629108.

It is not an unprimeable number, because it can be changed into a prime (263629141) 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 7 ways as a sum of consecutive naturals, for example, 2027852 + ... + 2027981.

It is an arithmetic number, because the mean of its divisors is an integer number (42586257).

Almost surely, 2^263629145 is an apocalyptic number.

It is an amenable number.

263629145 is a deficient number, since it is larger than the sum of its proper divisors (77060911).

263629145 is a wasteful number, since it uses less digits than its factorization.

263629145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055851.

The product of its digits is 77760, while the sum is 38.

The square root of 263629145 is about 16236.6605248739. The cubic root of 263629145 is about 641.2063388330.

The spelling of 263629145 in words is "two hundred sixty-three million, six hundred twenty-nine thousand, one hundred forty-five".