87475249 has 2 divisors, whose sum is σ = 87475250. Its totient is φ = 87475248.

The previous prime is 87475247. The next prime is 87475253. The reversal of 87475249 is 94257478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74943649 + 12531600 = 8657^2 + 3540^2 .

It is a cyclic number.

It is not a de Polignac number, because 87475249 - 2¹ = 87475247 is a prime.

It is a super-2 number, since 2×87475249² = 15303838375224002, which contains 22 as substring.

Together with 87475247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 87475199 and 87475208.

It is not a weakly prime, because it can be changed into another prime (87475247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43737624 + 43737625.

It is an arithmetic number, because the mean of its divisors is an integer number (43737625).

Almost surely, 2^87475249 is an apocalyptic number.

It is an amenable number.

87475249 is a deficient number, since it is larger than the sum of its proper divisors (1).

87475249 is an equidigital number, since it uses as much as digits as its factorization.

87475249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 87475249 is about 9352.8203767634. The cubic root of 87475249 is about 443.9101369010.

The spelling of 87475249 in words is "eighty-seven million, four hundred seventy-five thousand, two hundred forty-nine".