997403777 has 2 divisors, whose sum is σ = 997403778. Its totient is φ = 997403776.

The previous prime is 997403713. The next prime is 997403801. The reversal of 997403777 is 777304799.

It is a happy number.

997403777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770118001 + 227285776 = 27751^2 + 15076^2 .

It is a cyclic number.

It is not a de Polignac number, because 997403777 - 2⁶ = 997403713 is a prime.

It is not a weakly prime, because it can be changed into another prime (997403707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498701888 + 498701889.

It is an arithmetic number, because the mean of its divisors is an integer number (498701889).

Almost surely, 2^997403777 is an apocalyptic number.

It is an amenable number.

997403777 is a deficient number, since it is larger than the sum of its proper divisors (1).

997403777 is an equidigital number, since it uses as much as digits as its factorization.

997403777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2333772, while the sum is 53.

The square root of 997403777 is about 31581.7000334054. The cubic root of 997403777 is about 999.1338423208.

The spelling of 997403777 in words is "nine hundred ninety-seven million, four hundred three thousand, seven hundred seventy-seven".