742769987 has 4 divisors (see below), whose sum is σ = 746919720. Its totient is φ = 738620256.

The previous prime is 742769969. The next prime is 742770029. The reversal of 742769987 is 789967247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789967247 = 1321 ⋅598007.

It is a cyclic number.

It is not a de Polignac number, because 742769987 - 2¹⁰ = 742768963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742769947) 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, 2074598 + ... + 2074955.

It is an arithmetic number, because the mean of its divisors is an integer number (186729930).

Almost surely, 2^742769987 is an apocalyptic number.

742769987 is a deficient number, since it is larger than the sum of its proper divisors (4149733).

742769987 is a wasteful number, since it uses less digits than its factorization.

742769987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149732.

The product of its digits is 10668672, while the sum is 59.

The square root of 742769987 is about 27253.8068350093. The cubic root of 742769987 is about 905.6313521298.

The spelling of 742769987 in words is "seven hundred forty-two million, seven hundred sixty-nine thousand, nine hundred eighty-seven".