775975397 has 2 divisors, whose sum is σ = 775975398. Its totient is φ = 775975396.

The previous prime is 775975393. The next prime is 775975429. The reversal of 775975397 is 793579577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484044001 + 291931396 = 22001^2 + 17086^2 .

It is a cyclic number.

It is not a de Polignac number, because 775975397 - 2² = 775975393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (775975391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387987698 + 387987699.

It is an arithmetic number, because the mean of its divisors is an integer number (387987699).

Almost surely, 2^775975397 is an apocalyptic number.

It is an amenable number.

775975397 is a deficient number, since it is larger than the sum of its proper divisors (1).

775975397 is an equidigital number, since it uses as much as digits as its factorization.

775975397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14586075, while the sum is 59.

The square root of 775975397 is about 27856.3349527536. The cubic root of 775975397 is about 918.9304667042.

The spelling of 775975397 in words is "seven hundred seventy-five million, nine hundred seventy-five thousand, three hundred ninety-seven".