102720773 has 2 divisors, whose sum is σ = 102720774. Its totient is φ = 102720772.

The previous prime is 102720743. The next prime is 102720791. The reversal of 102720773 is 377027201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83210884 + 19509889 = 9122^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 102720773 - 2¹⁴ = 102704389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102720733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51360386 + 51360387.

It is an arithmetic number, because the mean of its divisors is an integer number (51360387).

Almost surely, 2^102720773 is an apocalyptic number.

It is an amenable number.

102720773 is a deficient number, since it is larger than the sum of its proper divisors (1).

102720773 is an equidigital number, since it uses as much as digits as its factorization.

102720773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 102720773 is about 10135.1257022298. The cubic root of 102720773 is about 468.3308424139.

Adding to 102720773 its reverse (377027201), we get a palindrome (479747974).

The spelling of 102720773 in words is "one hundred two million, seven hundred twenty thousand, seven hundred seventy-three".