393535489493 has 8 divisors (see below), whose sum is σ = 404091496536. Its totient is φ = 383025081600.

The previous prime is 393535489469. The next prime is 393535489499. The reversal of 393535489493 is 394984535393.

It can be written as a sum of positive squares in 4 ways, for example, as 1035745489 + 392499744004 = 32183^2 + 626498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 393535489493 - 2¹² = 393535485397 is a prime.

It is a super-2 number, since 2×393535489493² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393535489499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11382296 + ... + 11416817.

It is an arithmetic number, because the mean of its divisors is an integer number (50511437067).

Almost surely, 2^393535489493 is an apocalyptic number.

It is an amenable number.

393535489493 is a deficient number, since it is larger than the sum of its proper divisors (10556007043).

393535489493 is a wasteful number, since it uses less digits than its factorization.

393535489493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22799575.

The product of its digits is 188956800, while the sum is 65.

The spelling of 393535489493 in words is "three hundred ninety-three billion, five hundred thirty-five million, four hundred eighty-nine thousand, four hundred ninety-three".