87289739 has 4 divisors (see below), whose sum is σ = 90299760. Its totient is φ = 84279720.

The previous prime is 87289729. The next prime is 87289757. The reversal of 87289739 is 93798278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87289739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87289729) 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, 1504967 + ... + 1505024.

It is an arithmetic number, because the mean of its divisors is an integer number (22574940).

Almost surely, 2^87289739 is an apocalyptic number.

87289739 is a deficient number, since it is larger than the sum of its proper divisors (3010021).

87289739 is a wasteful number, since it uses less digits than its factorization.

87289739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010020.

The product of its digits is 1524096, while the sum is 53.

The square root of 87289739 is about 9342.8977838784. The cubic root of 87289739 is about 443.5961126386.

The spelling of 87289739 in words is "eighty-seven million, two hundred eighty-nine thousand, seven hundred thirty-nine".