87375709 has 4 divisors (see below), whose sum is σ = 87475104. Its totient is φ = 87276316.

The previous prime is 87375703. The next prime is 87375719. The reversal of 87375709 is 90757378.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90757378 = 2 ⋅45378689.

It is a cyclic number.

It is not a de Polignac number, because 87375709 - 2⁷ = 87375581 is a prime.

It is a super-4 number, since 4×87375709⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87375703) 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, 48367 + ... + 50140.

It is an arithmetic number, because the mean of its divisors is an integer number (21868776).

Almost surely, 2^87375709 is an apocalyptic number.

It is an amenable number.

87375709 is a deficient number, since it is larger than the sum of its proper divisors (99395).

87375709 is an equidigital number, since it uses as much as digits as its factorization.

87375709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99394.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 87375709 is about 9347.4974725859. The cubic root of 87375709 is about 443.7416946406.

The spelling of 87375709 in words is "eighty-seven million, three hundred seventy-five thousand, seven hundred nine".