87207481 has 2 divisors, whose sum is σ = 87207482. Its totient is φ = 87207480.

The previous prime is 87207431. The next prime is 87207493. The reversal of 87207481 is 18470278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62157456 + 25050025 = 7884^2 + 5005^2 .

It is a cyclic number.

It is not a de Polignac number, because 87207481 - 2¹⁵ = 87174713 is a prime.

It is a super-2 number, since 2×87207481² = 15210289484730722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87207481.

It is not a weakly prime, because it can be changed into another prime (87207431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43603740 + 43603741.

It is an arithmetic number, because the mean of its divisors is an integer number (43603741).

Almost surely, 2^87207481 is an apocalyptic number.

It is an amenable number.

87207481 is a deficient number, since it is larger than the sum of its proper divisors (1).

87207481 is an equidigital number, since it uses as much as digits as its factorization.

87207481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 87207481 is about 9338.4945788923. The cubic root of 87207481 is about 443.4567270421.

The spelling of 87207481 in words is "eighty-seven million, two hundred seven thousand, four hundred eighty-one".