742827649 has 4 divisors (see below), whose sum is σ = 750485764. Its totient is φ = 735169536.

The previous prime is 742827647. The next prime is 742827661. The reversal of 742827649 is 946728247.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 404010000 + 338817649 = 20100^2 + 18407^2 .

It is a cyclic number.

It is not a de Polignac number, because 742827649 - 2¹ = 742827647 is a prime.

It is a super-2 number, since 2×742827649² = 1103585832237734402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742827647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3828912 + ... + 3829105.

It is an arithmetic number, because the mean of its divisors is an integer number (187621441).

Almost surely, 2^742827649 is an apocalyptic number.

It is an amenable number.

742827649 is a deficient number, since it is larger than the sum of its proper divisors (7658115).

742827649 is an equidigital number, since it uses as much as digits as its factorization.

742827649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7658114.

The product of its digits is 1354752, while the sum is 49.

The square root of 742827649 is about 27254.8646850429. The cubic root of 742827649 is about 905.6547865553.

The spelling of 742827649 in words is "seven hundred forty-two million, eight hundred twenty-seven thousand, six hundred forty-nine".