87240011 has 2 divisors, whose sum is σ = 87240012. Its totient is φ = 87240010.

The previous prime is 87239987. The next prime is 87240017. The reversal of 87240011 is 11004278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87240011 - 2¹⁴ = 87223627 is a prime.

It is a super-2 number, since 2×87240011² = 15221639038560242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87240017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43620005 + 43620006.

It is an arithmetic number, because the mean of its divisors is an integer number (43620006).

Almost surely, 2^87240011 is an apocalyptic number.

87240011 is a deficient number, since it is larger than the sum of its proper divisors (1).

87240011 is an equidigital number, since it uses as much as digits as its factorization.

87240011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 87240011 is about 9340.2361319187. The cubic root of 87240011 is about 443.5118593689.

Adding to 87240011 its reverse (11004278), we get a palindrome (98244289).

The spelling of 87240011 in words is "eighty-seven million, two hundred forty thousand, eleven".