693736397 has 2 divisors, whose sum is σ = 693736398. Its totient is φ = 693736396.

The previous prime is 693736363. The next prime is 693736409. The reversal of 693736397 is 793637396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600691081 + 93045316 = 24509^2 + 9646^2 .

It is a cyclic number.

It is not a de Polignac number, because 693736397 - 2⁶ = 693736333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (693736597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346868198 + 346868199.

It is an arithmetic number, because the mean of its divisors is an integer number (346868199).

Almost surely, 2^693736397 is an apocalyptic number.

It is an amenable number.

693736397 is a deficient number, since it is larger than the sum of its proper divisors (1).

693736397 is an equidigital number, since it uses as much as digits as its factorization.

693736397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3857868, while the sum is 53.

The square root of 693736397 is about 26338.8761529417. The cubic root of 693736397 is about 885.2477402337.

Subtracting 693736397 from its reverse (793637396), we obtain a palindrome (99900999).

It can be divided in two parts, 6937 and 36397, that added together give a palindrome (43334).

The spelling of 693736397 in words is "six hundred ninety-three million, seven hundred thirty-six thousand, three hundred ninety-seven".