497769861 has 4 divisors (see below), whose sum is σ = 663693152. Its totient is φ = 331846572.

The previous prime is 497769829. The next prime is 497769871. The reversal of 497769861 is 168967794.

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 not a de Polignac number, because 497769861 - 2⁵ = 497769829 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 (497769871) 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, 82961641 + ... + 82961646.

It is an arithmetic number, because the mean of its divisors is an integer number (165923288).

Almost surely, 2^497769861 is an apocalyptic number.

It is an amenable number.

497769861 is a deficient number, since it is larger than the sum of its proper divisors (165923291).

497769861 is a wasteful number, since it uses less digits than its factorization.

497769861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165923290.

The product of its digits is 4572288, while the sum is 57.

The square root of 497769861 is about 22310.7566209665. The cubic root of 497769861 is about 792.5187255209.

The spelling of 497769861 in words is "four hundred ninety-seven million, seven hundred sixty-nine thousand, eight hundred sixty-one".