742811389 has 2 divisors, whose sum is σ = 742811390. Its totient is φ = 742811388.

The previous prime is 742811387. The next prime is 742811401. The reversal of 742811389 is 983118247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731702500 + 11108889 = 27050^2 + 3333^2 .

It is a cyclic number.

It is not a de Polignac number, because 742811389 - 2¹ = 742811387 is a prime.

Together with 742811387, it forms a pair of twin primes.

It is equal to p_38351878 and since 742811389 and 38351878 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742811387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371405694 + 371405695.

It is an arithmetic number, because the mean of its divisors is an integer number (371405695).

Almost surely, 2^742811389 is an apocalyptic number.

It is an amenable number.

742811389 is a deficient number, since it is larger than the sum of its proper divisors (1).

742811389 is an equidigital number, since it uses as much as digits as its factorization.

742811389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 742811389 is about 27254.5663880385. The cubic root of 742811389 is about 905.6481784481.

The spelling of 742811389 in words is "seven hundred forty-two million, eight hundred eleven thousand, three hundred eighty-nine".