772493261 has 2 divisors, whose sum is σ = 772493262. Its totient is φ = 772493260.

The previous prime is 772493233. The next prime is 772493263. The reversal of 772493261 is 162394277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528540100 + 243953161 = 22990^2 + 15619^2 .

It is an emirp because it is prime and its reverse (162394277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-772493261 is a prime.

Together with 772493263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772493263) 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, 386246630 + 386246631.

It is an arithmetic number, because the mean of its divisors is an integer number (386246631).

Almost surely, 2^772493261 is an apocalyptic number.

It is an amenable number.

772493261 is a deficient number, since it is larger than the sum of its proper divisors (1).

772493261 is an equidigital number, since it uses as much as digits as its factorization.

772493261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 772493261 is about 27793.7629874042. The cubic root of 772493261 is about 917.5538598362.

The spelling of 772493261 in words is "seven hundred seventy-two million, four hundred ninety-three thousand, two hundred sixty-one".