87567461 has 2 divisors, whose sum is σ = 87567462. Its totient is φ = 87567460.

The previous prime is 87567457. The next prime is 87567497. The reversal of 87567461 is 16476578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84070561 + 3496900 = 9169^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 87567461 - 2² = 87567457 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87567421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43783730 + 43783731.

It is an arithmetic number, because the mean of its divisors is an integer number (43783731).

Almost surely, 2^87567461 is an apocalyptic number.

It is an amenable number.

87567461 is a deficient number, since it is larger than the sum of its proper divisors (1).

87567461 is an equidigital number, since it uses as much as digits as its factorization.

87567461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 87567461 is about 9357.7487143009. The cubic root of 87567461 is about 444.0660646899.

The spelling of 87567461 in words is "eighty-seven million, five hundred sixty-seven thousand, four hundred sixty-one".