87154297 has 2 divisors, whose sum is σ = 87154298. Its totient is φ = 87154296.

The previous prime is 87154279. The next prime is 87154321. The reversal of 87154297 is 79245178.

Together with previous prime (87154279) 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., 83375161 + 3779136 = 9131^2 + 1944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87154297 is a prime.

It is not a weakly prime, because it can be changed into another prime (87154247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43577148 + 43577149.

It is an arithmetic number, because the mean of its divisors is an integer number (43577149).

Almost surely, 2^87154297 is an apocalyptic number.

It is an amenable number.

87154297 is a deficient number, since it is larger than the sum of its proper divisors (1).

87154297 is an equidigital number, since it uses as much as digits as its factorization.

87154297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 87154297 is about 9335.6465764295. The cubic root of 87154297 is about 443.3665604709.

The spelling of 87154297 in words is "eighty-seven million, one hundred fifty-four thousand, two hundred ninety-seven".