87429161 has 2 divisors, whose sum is σ = 87429162. Its totient is φ = 87429160.

The previous prime is 87429137. The next prime is 87429163. The reversal of 87429161 is 16192478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 1755625 = 9256^2 + 1325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87429161 is a prime.

It is a Sophie Germain prime.

Together with 87429163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (87429163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43714580 + 43714581.

It is an arithmetic number, because the mean of its divisors is an integer number (43714581).

Almost surely, 2^87429161 is an apocalyptic number.

It is an amenable number.

87429161 is a deficient number, since it is larger than the sum of its proper divisors (1).

87429161 is an equidigital number, since it uses as much as digits as its factorization.

87429161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 87429161 is about 9350.3561964237. The cubic root of 87429161 is about 443.8321623701.

The spelling of 87429161 in words is "eighty-seven million, four hundred twenty-nine thousand, one hundred sixty-one".