771290249 has 2 divisors, whose sum is σ = 771290250. Its totient is φ = 771290248.

The previous prime is 771290243. The next prime is 771290321. The reversal of 771290249 is 942092177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 642876025 + 128414224 = 25355^2 + 11332^2 .

It is a cyclic number.

It is not a de Polignac number, because 771290249 - 2⁸ = 771289993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (771290243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385645124 + 385645125.

It is an arithmetic number, because the mean of its divisors is an integer number (385645125).

Almost surely, 2^771290249 is an apocalyptic number.

It is an amenable number.

771290249 is a deficient number, since it is larger than the sum of its proper divisors (1).

771290249 is an equidigital number, since it uses as much as digits as its factorization.

771290249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 771290249 is about 27772.1127932320. The cubic root of 771290249 is about 917.0773068973.

The spelling of 771290249 in words is "seven hundred seventy-one million, two hundred ninety thousand, two hundred forty-nine".