87241439 has 2 divisors, whose sum is σ = 87241440. Its totient is φ = 87241438.

The previous prime is 87241423. The next prime is 87241459. The reversal of 87241439 is 93414278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87241439 - 2⁴ = 87241423 is a prime.

It is a super-2 number, since 2×87241439² = 15222137357581442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87241459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43620719 + 43620720.

It is an arithmetic number, because the mean of its divisors is an integer number (43620720).

Almost surely, 2^87241439 is an apocalyptic number.

87241439 is a deficient number, since it is larger than the sum of its proper divisors (1).

87241439 is an equidigital number, since it uses as much as digits as its factorization.

87241439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 87241439 is about 9340.3125750694. The cubic root of 87241439 is about 443.5142792505.

The spelling of 87241439 in words is "eighty-seven million, two hundred forty-one thousand, four hundred thirty-nine".