535497921 has 18 divisors (see below), whose sum is σ = 899782962. Its totient is φ = 305998560.

The previous prime is 535497889. The next prime is 535497923. The reversal of 535497921 is 129794535.

It is a happy number.

535497921 is a `hidden beast` number, since 535 + 4 + 97 + 9 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 406425600 + 129072321 = 20160^2 + 11361^2 .

It is not a de Polignac number, because 535497921 - 2⁵ = 535497889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (535497923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 606700 + ... + 607581.

Almost surely, 2^535497921 is an apocalyptic number.

It is an amenable number.

535497921 is a deficient number, since it is larger than the sum of its proper divisors (364285041).

535497921 is a wasteful number, since it uses less digits than its factorization.

535497921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214301 (or 1214291 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 535497921 is about 23140.8280102506. The cubic root of 535497921 is about 812.0559067730.

The spelling of 535497921 in words is "five hundred thirty-five million, four hundred ninety-seven thousand, nine hundred twenty-one".