742812869 has 2 divisors, whose sum is σ = 742812870. Its totient is φ = 742812868.

The previous prime is 742812859. The next prime is 742812871. The reversal of 742812869 is 968218247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653415844 + 89397025 = 25562^2 + 9455^2 .

It is an emirp because it is prime and its reverse (968218247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742812869 - 2⁸ = 742812613 is a prime.

It is a super-2 number, since 2×742812869² = 1103541916704022322, which contains 22 as substring.

Together with 742812871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (742812839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371406434 + 371406435.

It is an arithmetic number, because the mean of its divisors is an integer number (371406435).

Almost surely, 2^742812869 is an apocalyptic number.

It is an amenable number.

742812869 is a deficient number, since it is larger than the sum of its proper divisors (1).

742812869 is an equidigital number, since it uses as much as digits as its factorization.

742812869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 742812869 is about 27254.5935394384. The cubic root of 742812869 is about 905.6487799280.

The spelling of 742812869 in words is "seven hundred forty-two million, eight hundred twelve thousand, eight hundred sixty-nine".