87973243 has 2 divisors, whose sum is σ = 87973244. Its totient is φ = 87973242.

The previous prime is 87973231. The next prime is 87973247. The reversal of 87973243 is 34237978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87973243 - 2¹⁷ = 87842171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87973243.

It is not a weakly prime, because it can be changed into another prime (87973247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43986621 + 43986622.

It is an arithmetic number, because the mean of its divisors is an integer number (43986622).

Almost surely, 2^87973243 is an apocalyptic number.

87973243 is a deficient number, since it is larger than the sum of its proper divisors (1).

87973243 is an equidigital number, since it uses as much as digits as its factorization.

87973243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 87973243 is about 9379.4052583306. The cubic root of 87973243 is about 444.7509324567.

The spelling of 87973243 in words is "eighty-seven million, nine hundred seventy-three thousand, two hundred forty-three".