693213428 has 6 divisors (see below), whose sum is σ = 1213123506. Its totient is φ = 346606712.

The previous prime is 693213421. The next prime is 693213467. The reversal of 693213428 is 824312396.

It can be written as a sum of positive squares in only one way, i.e., 563207824 + 130005604 = 23732^2 + 11402^2 .

It is a super-2 number, since 2×693213428² = 961089713519022368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 693213391 and 693213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693213421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86651675 + ... + 86651682.

It is an arithmetic number, because the mean of its divisors is an integer number (202187251).

Almost surely, 2^693213428 is an apocalyptic number.

It is an amenable number.

693213428 is a deficient number, since it is larger than the sum of its proper divisors (519910078).

693213428 is a wasteful number, since it uses less digits than its factorization.

693213428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173303361 (or 173303359 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 693213428 is about 26328.9465797627. The cubic root of 693213428 is about 885.0252380899.

The spelling of 693213428 in words is "six hundred ninety-three million, two hundred thirteen thousand, four hundred twenty-eight".