87018452249 has 4 divisors (see below), whose sum is σ = 87332598564. Its totient is φ = 86704305936.

The previous prime is 87018452237. The next prime is 87018452267. The reversal of 87018452249 is 94225481078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94225481078 = 2 ⋅47112740539.

It can be written as a sum of positive squares in 2 ways, for example, as 24698322649 + 62320129600 = 157157^2 + 249640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87018452249 is a prime.

It is a super-2 number, since 2×87018452249² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87018452197 and 87018452206.

It is not an unprimeable number, because it can be changed into a prime (87018452219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157072742 + ... + 157073295.

It is an arithmetic number, because the mean of its divisors is an integer number (21833149641).

Almost surely, 2^87018452249 is an apocalyptic number.

It is an amenable number.

87018452249 is a deficient number, since it is larger than the sum of its proper divisors (314146315).

87018452249 is a wasteful number, since it uses less digits than its factorization.

87018452249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314146314.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 87018452249 in words is "eighty-seven billion, eighteen million, four hundred fifty-two thousand, two hundred forty-nine".