742708987 has 4 divisors (see below), whose sum is σ = 743123176. Its totient is φ = 742294800.

The previous prime is 742708963. The next prime is 742708997. The reversal of 742708987 is 789807247.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789807247 = 1187 ⋅665381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742708987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742708907) 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 in 3 ways as a sum of consecutive naturals, for example, 204393 + ... + 207994.

It is an arithmetic number, because the mean of its divisors is an integer number (185780794).

Almost surely, 2^742708987 is an apocalyptic number.

742708987 is a deficient number, since it is larger than the sum of its proper divisors (414189).

742708987 is a wasteful number, since it uses less digits than its factorization.

742708987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414188.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The square root of 742708987 is about 27252.6877023166. The cubic root of 742708987 is about 905.6065597868.

The spelling of 742708987 in words is "seven hundred forty-two million, seven hundred eight thousand, nine hundred eighty-seven".