87373709 has 2 divisors, whose sum is σ = 87373710. Its totient is φ = 87373708.

The previous prime is 87373691. The next prime is 87373729. The reversal of 87373709 is 90737378.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84584809 + 2788900 = 9197^2 + 1670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87373709 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87373709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87373729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43686854 + 43686855.

It is an arithmetic number, because the mean of its divisors is an integer number (43686855).

Almost surely, 2^87373709 is an apocalyptic number.

It is an amenable number.

87373709 is a deficient number, since it is larger than the sum of its proper divisors (1).

87373709 is an equidigital number, since it uses as much as digits as its factorization.

87373709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 87373709 is about 9347.3904914687. The cubic root of 87373709 is about 443.7383089163.

The spelling of 87373709 in words is "eighty-seven million, three hundred seventy-three thousand, seven hundred nine".