997773377 has 2 divisors, whose sum is σ = 997773378. Its totient is φ = 997773376.

The previous prime is 997773349. The next prime is 997773379. The reversal of 997773377 is 773377799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693584896 + 304188481 = 26336^2 + 17441^2 .

It is a cyclic number.

It is not a de Polignac number, because 997773377 - 2⁸ = 997773121 is a prime.

Together with 997773379, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (997773379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498886688 + 498886689.

It is an arithmetic number, because the mean of its divisors is an integer number (498886689).

Almost surely, 2^997773377 is an apocalyptic number.

It is an amenable number.

997773377 is a deficient number, since it is larger than the sum of its proper divisors (1).

997773377 is an equidigital number, since it uses as much as digits as its factorization.

997773377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12252303, while the sum is 59.

The square root of 997773377 is about 31587.5509813597. The cubic root of 997773377 is about 999.2572407787.

The spelling of 997773377 in words is "nine hundred ninety-seven million, seven hundred seventy-three thousand, three hundred seventy-seven".