497145681 has 36 divisors (see below), whose sum is σ = 758498832. Its totient is φ = 325351728.

The previous prime is 497145631. The next prime is 497145689. The reversal of 497145681 is 186541794.

It is not a de Polignac number, because 497145681 - 2²¹ = 495048529 is a prime.

It is a super-3 number, since 3×497145681³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (497145689) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3166455 + ... + 3166611.

It is an arithmetic number, because the mean of its divisors is an integer number (21069412).

Almost surely, 2^497145681 is an apocalyptic number.

It is an amenable number.

497145681 is a deficient number, since it is larger than the sum of its proper divisors (261353151).

497145681 is an frugal number, since it uses more digits than its factorization.

497145681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 243 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 497145681 is about 22296.7639131781. The cubic root of 497145681 is about 792.1873265572.

The spelling of 497145681 in words is "four hundred ninety-seven million, one hundred forty-five thousand, six hundred eighty-one".