87203513 has 2 divisors, whose sum is σ = 87203514. Its totient is φ = 87203512.

The previous prime is 87203507. The next prime is 87203617. The reversal of 87203513 is 31530278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46076944 + 41126569 = 6788^2 + 6413^2 .

It is a cyclic number.

It is not a de Polignac number, because 87203513 - 2⁶ = 87203449 is a prime.

It is equal to p_5064338 and since 87203513 and 5064338 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (87203503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43601756 + 43601757.

It is an arithmetic number, because the mean of its divisors is an integer number (43601757).

Almost surely, 2^87203513 is an apocalyptic number.

It is an amenable number.

87203513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87203513 is an equidigital number, since it uses as much as digits as its factorization.

87203513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 87203513 is about 9338.2821225320. The cubic root of 87203513 is about 443.4500010787.

The spelling of 87203513 in words is "eighty-seven million, two hundred three thousand, five hundred thirteen".