774431197 has 2 divisors, whose sum is σ = 774431198. Its totient is φ = 774431196.

The previous prime is 774431153. The next prime is 774431239. The reversal of 774431197 is 791134477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 495240516 + 279190681 = 22254^2 + 16709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774431197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (774431117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387215598 + 387215599.

It is an arithmetic number, because the mean of its divisors is an integer number (387215599).

Almost surely, 2^774431197 is an apocalyptic number.

It is an amenable number.

774431197 is a deficient number, since it is larger than the sum of its proper divisors (1).

774431197 is an equidigital number, since it uses as much as digits as its factorization.

774431197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176, while the sum is 43.

The square root of 774431197 is about 27828.6039355193. The cubic root of 774431197 is about 918.3205011658.

The spelling of 774431197 in words is "seven hundred seventy-four million, four hundred thirty-one thousand, one hundred ninety-seven".