767648197 has 6 divisors (see below), whose sum is σ = 769263378. Its totient is φ = 766035792.

The previous prime is 767648179. The next prime is 767648239. The reversal of 767648197 is 791846767.

It can be written as a sum of positive squares in 3 ways, for example, as 25140196 + 742508001 = 5014^2 + 27249^2 .

It is not a de Polignac number, because 767648197 - 2¹⁹ = 767123909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (767648137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 686683 + ... + 687799.

It is an arithmetic number, because the mean of its divisors is an integer number (128210563).

Almost surely, 2^767648197 is an apocalyptic number.

It is an amenable number.

767648197 is a deficient number, since it is larger than the sum of its proper divisors (1615181).

767648197 is an frugal number, since it uses more digits than its factorization.

767648197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 1946 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The square root of 767648197 is about 27706.4648953994. The cubic root of 767648197 is about 915.6315414692.

The spelling of 767648197 in words is "seven hundred sixty-seven million, six hundred forty-eight thousand, one hundred ninety-seven".