497521651937 has 4 divisors (see below), whose sum is σ = 497755342020. Its totient is φ = 497287961856.

The previous prime is 497521651909. The next prime is 497521651967. The reversal of 497521651937 is 739156125794.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 299998293841 + 197523358096 = 547721^2 + 444436^2 .

It is a cyclic number.

It is not a de Polignac number, because 497521651937 - 2⁸ = 497521651681 is a prime.

It is a super-2 number, since 2×497521651937² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497521651967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116841848 + ... + 116846105.

It is an arithmetic number, because the mean of its divisors is an integer number (124438835505).

Almost surely, 2^497521651937 is an apocalyptic number.

It is an amenable number.

497521651937 is a deficient number, since it is larger than the sum of its proper divisors (233690083).

497521651937 is a wasteful number, since it uses less digits than its factorization.

497521651937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233690082.

The product of its digits is 14288400, while the sum is 59.

The spelling of 497521651937 in words is "four hundred ninety-seven billion, five hundred twenty-one million, six hundred fifty-one thousand, nine hundred thirty-seven".