87054013 has 2 divisors, whose sum is σ = 87054014. Its totient is φ = 87054012.

The previous prime is 87053999. The next prime is 87054031. The reversal of 87054013 is 31045078.

87054013 = 6597² + 6598².

Together with next prime (87054031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43533604 + 43520409 = 6598^2 + 6597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87054013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87054073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43527006 + 43527007.

It is an arithmetic number, because the mean of its divisors is an integer number (43527007).

Almost surely, 2^87054013 is an apocalyptic number.

87054013 is the 6598-th centered square number.

It is an amenable number.

87054013 is a deficient number, since it is larger than the sum of its proper divisors (1).

87054013 is an equidigital number, since it uses as much as digits as its factorization.

87054013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 87054013 is about 9330.2740045510. The cubic root of 87054013 is about 443.1964421168.

The spelling of 87054013 in words is "eighty-seven million, fifty-four thousand, thirteen".