724367987 has 4 divisors (see below), whose sum is σ = 827849136. Its totient is φ = 620886840.

The previous prime is 724367983. The next prime is 724367993. The reversal of 724367987 is 789763427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789763427 = 97 ⋅8141891.

It is not a de Polignac number, because 724367987 - 2² = 724367983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724367983) 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, 51740564 + ... + 51740577.

It is an arithmetic number, because the mean of its divisors is an integer number (206962284).

Almost surely, 2^724367987 is an apocalyptic number.

724367987 is a deficient number, since it is larger than the sum of its proper divisors (103481149).

724367987 is a wasteful number, since it uses less digits than its factorization.

724367987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103481148.

The product of its digits is 3556224, while the sum is 53.

The square root of 724367987 is about 26914.0852900484. The cubic root of 724367987 is about 898.0897702595.

The spelling of 724367987 in words is "seven hundred twenty-four million, three hundred sixty-seven thousand, nine hundred eighty-seven".