87840373 has 2 divisors, whose sum is σ = 87840374. Its totient is φ = 87840372.

The previous prime is 87840371. The next prime is 87840461. The reversal of 87840373 is 37304878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72301009 + 15539364 = 8503^2 + 3942^2 .

It is a cyclic number.

It is not a de Polignac number, because 87840373 - 2¹ = 87840371 is a prime.

It is a super-3 number, since 3×87840373³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 87840371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87840371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43920186 + 43920187.

It is an arithmetic number, because the mean of its divisors is an integer number (43920187).

Almost surely, 2^87840373 is an apocalyptic number.

It is an amenable number.

87840373 is a deficient number, since it is larger than the sum of its proper divisors (1).

87840373 is an equidigital number, since it uses as much as digits as its factorization.

87840373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 87840373 is about 9372.3195101320. The cubic root of 87840373 is about 444.5269104314.

The spelling of 87840373 in words is "eighty-seven million, eight hundred forty thousand, three hundred seventy-three".