495691381 has 4 divisors (see below), whose sum is σ = 496560064. Its totient is φ = 494822700.

The previous prime is 495691379. The next prime is 495691409. The reversal of 495691381 is 183196594.

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 495691381 - 2¹ = 495691379 is a prime.

It is a super-2 number, since 2×495691381² = 491419890395374322, 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 (495691081) 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, 433485 + ... + 434626.

It is an arithmetic number, because the mean of its divisors is an integer number (124140016).

Almost surely, 2^495691381 is an apocalyptic number.

It is an amenable number.

495691381 is a deficient number, since it is larger than the sum of its proper divisors (868683).

495691381 is an equidigital number, since it uses as much as digits as its factorization.

495691381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868682.

The product of its digits is 233280, while the sum is 46.

The square root of 495691381 is about 22264.1276721097. The cubic root of 495691381 is about 791.4141103797.

The spelling of 495691381 in words is "four hundred ninety-five million, six hundred ninety-one thousand, three hundred eighty-one".