739987 has 4 divisors (see below), whose sum is σ = 757240. Its totient is φ = 722736.

The previous prime is 739969. The next prime is 740011. The reversal of 739987 is 789937.

739987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789937 = 139 ⋅5683.

It is a cyclic number.

It is not a de Polignac number, because 739987 - 2⁷ = 739859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 17209 = 739987 / (7 + 3 + 9 + 9 + 8 + 7).

It is a Duffinian number.

739987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (739957) 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, 8562 + ... + 8647.

It is an arithmetic number, because the mean of its divisors is an integer number (189310).

2⁷³⁹⁹⁸⁷ is an apocalyptic number.

739987 is a deficient number, since it is larger than the sum of its proper divisors (17253).

739987 is a wasteful number, since it uses less digits than its factorization.

739987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17252.

The product of its digits is 95256, while the sum is 43.

The square root of 739987 is about 860.2249705746. The cubic root of 739987 is about 90.4498872974.

The spelling of 739987 in words is "seven hundred thirty-nine thousand, nine hundred eighty-seven".