768397537 has 4 divisors (see below), whose sum is σ = 789165076. Its totient is φ = 747630000.

The previous prime is 768397499. The next prime is 768397583. The reversal of 768397537 is 735793867.

768397537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 308037601 + 460359936 = 17551^2 + 21456^2 .

It is a cyclic number.

It is not a de Polignac number, because 768397537 - 2¹¹ = 768395489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768394537) 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, 10383714 + ... + 10383787.

It is an arithmetic number, because the mean of its divisors is an integer number (197291269).

Almost surely, 2^768397537 is an apocalyptic number.

It is an amenable number.

768397537 is a deficient number, since it is larger than the sum of its proper divisors (20767539).

768397537 is a wasteful number, since it uses less digits than its factorization.

768397537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20767538.

The product of its digits is 6667920, while the sum is 55.

The square root of 768397537 is about 27719.9844336176. The cubic root of 768397537 is about 915.9293759074.

The spelling of 768397537 in words is "seven hundred sixty-eight million, three hundred ninety-seven thousand, five hundred thirty-seven".