742777813 has 2 divisors, whose sum is σ = 742777814. Its totient is φ = 742777812.

The previous prime is 742777807. The next prime is 742777817. The reversal of 742777813 is 318777247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 742126564 + 651249 = 27242^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 742777813 - 2¹⁷ = 742646741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742777817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371388906 + 371388907.

It is an arithmetic number, because the mean of its divisors is an integer number (371388907).

Almost surely, 2^742777813 is an apocalyptic number.

It is an amenable number.

742777813 is a deficient number, since it is larger than the sum of its proper divisors (1).

742777813 is an equidigital number, since it uses as much as digits as its factorization.

742777813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460992, while the sum is 46.

The square root of 742777813 is about 27253.9504109037. The cubic root of 742777813 is about 905.6345327673.

It can be divided in two parts, 742777 and 813, that added together give a triangular number (743590 = T₁₂₁₉).

The spelling of 742777813 in words is "seven hundred forty-two million, seven hundred seventy-seven thousand, eight hundred thirteen".