495925781 has 8 divisors (see below), whose sum is σ = 552490680. Its totient is φ = 441991872.

The previous prime is 495925777. The next prime is 495925799. The reversal of 495925781 is 187529594.

It can be written as a sum of positive squares in 4 ways, for example, as 1575025 + 494350756 = 1255^2 + 22234^2 .

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 495925781 - 2² = 495925777 is a prime.

It is a super-2 number, since 2×495925781² = 491884760520919922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495925721) 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, 657350 + ... + 658103.

It is an arithmetic number, because the mean of its divisors is an integer number (69061335).

Almost surely, 2^495925781 is an apocalyptic number.

It is an amenable number.

495925781 is a deficient number, since it is larger than the sum of its proper divisors (56564899).

495925781 is a wasteful number, since it uses less digits than its factorization.

495925781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315495.

The product of its digits is 907200, while the sum is 50.

The square root of 495925781 is about 22269.3911232436. The cubic root of 495925781 is about 791.5388373379.

The spelling of 495925781 in words is "four hundred ninety-five million, nine hundred twenty-five thousand, seven hundred eighty-one".