87049993 has 2 divisors, whose sum is σ = 87049994. Its totient is φ = 87049992.

The previous prime is 87049973. The next prime is 87050003. The reversal of 87049993 is 39994078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68757264 + 18292729 = 8292^2 + 4277^2 .

It is a cyclic number.

It is not a de Polignac number, because 87049993 - 2¹⁷ = 86918921 is a prime.

It is not a weakly prime, because it can be changed into another prime (87049913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43524996 + 43524997.

It is an arithmetic number, because the mean of its divisors is an integer number (43524997).

Almost surely, 2^87049993 is an apocalyptic number.

It is an amenable number.

87049993 is a deficient number, since it is larger than the sum of its proper divisors (1).

87049993 is an equidigital number, since it uses as much as digits as its factorization.

87049993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 87049993 is about 9330.0585743070. The cubic root of 87049993 is about 443.1896200032.

The spelling of 87049993 in words is "eighty-seven million, forty-nine thousand, nine hundred ninety-three".