87309039 has 8 divisors (see below), whose sum is σ = 116507392. Its totient is φ = 58158360.

The previous prime is 87309037. The next prime is 87309041. The reversal of 87309039 is 93090378.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87309037) and next prime (87309041).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87309039 - 2¹ = 87309037 is a prime.

It is a super-2 number, since 2×87309039² = 15245736582207042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87308988 and 87309006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87309031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7399 + ... + 15144.

It is an arithmetic number, because the mean of its divisors is an integer number (14563424).

Almost surely, 2^87309039 is an apocalyptic number.

87309039 is a deficient number, since it is larger than the sum of its proper divisors (29198353).

87309039 is a wasteful number, since it uses less digits than its factorization.

87309039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23837.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 87309039 is about 9343.9305969169. The cubic root of 87309039 is about 443.6288036672.

The spelling of 87309039 in words is "eighty-seven million, three hundred nine thousand, thirty-nine".