742479747 has 4 divisors (see below), whose sum is σ = 989973000. Its totient is φ = 494986496.

The previous prime is 742479733. The next prime is 742479763. The reversal of 742479747 is 747974247.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 742479747 - 2¹¹ = 742477699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 742479747.

It is not an unprimeable number, because it can be changed into a prime (742479797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123746622 + ... + 123746627.

It is an arithmetic number, because the mean of its divisors is an integer number (247493250).

Almost surely, 2^742479747 is an apocalyptic number.

742479747 is a deficient number, since it is larger than the sum of its proper divisors (247493253).

742479747 is a wasteful number, since it uses less digits than its factorization.

742479747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247493252.

The product of its digits is 2765952, while the sum is 51.

The square root of 742479747 is about 27248.4815540243. The cubic root of 742479747 is about 905.5133772106.

The spelling of 742479747 in words is "seven hundred forty-two million, four hundred seventy-nine thousand, seven hundred forty-seven".