742988761 has 2 divisors, whose sum is σ = 742988762. Its totient is φ = 742988760.

The previous prime is 742988747. The next prime is 742988773. The reversal of 742988761 is 167889247.

742988761 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., 742889536 + 99225 = 27256^2 + 315^2 .

It is an emirp because it is prime and its reverse (167889247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742988761 - 2¹⁹ = 742464473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 742988699 and 742988708.

It is not a weakly prime, because it can be changed into another prime (742988161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371494380 + 371494381.

It is an arithmetic number, because the mean of its divisors is an integer number (371494381).

Almost surely, 2^742988761 is an apocalyptic number.

It is an amenable number.

742988761 is a deficient number, since it is larger than the sum of its proper divisors (1).

742988761 is an equidigital number, since it uses as much as digits as its factorization.

742988761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The square root of 742988761 is about 27257.8201806381. The cubic root of 742988761 is about 905.7202576896.

The spelling of 742988761 in words is "seven hundred forty-two million, nine hundred eighty-eight thousand, seven hundred sixty-one".