87709739 has 4 divisors (see below), whose sum is σ = 94456656. Its totient is φ = 80962824.

The previous prime is 87709703. The next prime is 87709747. The reversal of 87709739 is 93790778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93790778 = 2 ⋅46895389.

It is a cyclic number.

It is not a de Polignac number, because 87709739 - 2⁸ = 87709483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87709639) 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, 3373439 + ... + 3373464.

It is an arithmetic number, because the mean of its divisors is an integer number (23614164).

Almost surely, 2^87709739 is an apocalyptic number.

87709739 is a deficient number, since it is larger than the sum of its proper divisors (6746917).

87709739 is a wasteful number, since it uses less digits than its factorization.

87709739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746916.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 87709739 is about 9365.3477778457. The cubic root of 87709739 is about 444.3064380102.

The spelling of 87709739 in words is "eighty-seven million, seven hundred nine thousand, seven hundred thirty-nine".