87475247 has 2 divisors, whose sum is σ = 87475248. Its totient is φ = 87475246.

The previous prime is 87475237. The next prime is 87475249. The reversal of 87475247 is 74257478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87475247 - 2⁴ = 87475231 is a prime.

It is a super-2 number, since 2×87475247² = 15303837675422018, which contains 22 as substring.

Together with 87475249, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87475198 and 87475207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87475249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43737623 + 43737624.

It is an arithmetic number, because the mean of its divisors is an integer number (43737624).

Almost surely, 2^87475247 is an apocalyptic number.

87475247 is a deficient number, since it is larger than the sum of its proper divisors (1).

87475247 is an equidigital number, since it uses as much as digits as its factorization.

87475247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 44.

The square root of 87475247 is about 9352.8202698437. The cubic root of 87475247 is about 443.9101335178.

The spelling of 87475247 in words is "eighty-seven million, four hundred seventy-five thousand, two hundred forty-seven".