772294421 has 2 divisors, whose sum is σ = 772294422. Its totient is φ = 772294420.

The previous prime is 772294417. The next prime is 772294423. The reversal of 772294421 is 124492277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650964196 + 121330225 = 25514^2 + 11015^2 .

It is a cyclic number.

It is not a de Polignac number, because 772294421 - 2² = 772294417 is a prime.

Together with 772294423, 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 (772294423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 386147210 + 386147211.

It is an arithmetic number, because the mean of its divisors is an integer number (386147211).

Almost surely, 2^772294421 is an apocalyptic number.

It is an amenable number.

772294421 is a deficient number, since it is larger than the sum of its proper divisors (1).

772294421 is an equidigital number, since it uses as much as digits as its factorization.

772294421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 772294421 is about 27790.1856956732. The cubic root of 772294421 is about 917.4751268664.

The spelling of 772294421 in words is "seven hundred seventy-two million, two hundred ninety-four thousand, four hundred twenty-one".