742087813 has 2 divisors, whose sum is σ = 742087814. Its totient is φ = 742087812.

The previous prime is 742087739. The next prime is 742087831. The reversal of 742087813 is 318780247.

742087813 = 19262² + 19263².

742087813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (742087831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371063169 + 371024644 = 19263^2 + 19262^2 .

It is a cyclic number.

It is not a de Polignac number, because 742087813 - 2⁹ = 742087301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742027813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371043906 + 371043907.

It is an arithmetic number, because the mean of its divisors is an integer number (371043907).

Almost surely, 2^742087813 is an apocalyptic number.

742087813 is the 19263-rd centered square number.

It is an amenable number.

742087813 is a deficient number, since it is larger than the sum of its proper divisors (1).

742087813 is an equidigital number, since it uses as much as digits as its factorization.

742087813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 742087813 is about 27241.2887543890. The cubic root of 742087813 is about 905.3540175570.

The spelling of 742087813 in words is "seven hundred forty-two million, eighty-seven thousand, eight hundred thirteen".