87219029 has 2 divisors, whose sum is σ = 87219030. Its totient is φ = 87219028.

The previous prime is 87219023. The next prime is 87219031. The reversal of 87219029 is 92091278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 15816529 = 8450^2 + 3977^2 .

It is a cyclic number.

It is not a de Polignac number, because 87219029 - 2⁸ = 87218773 is a prime.

Together with 87219031, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 87219029 parts by 13207 straight cuts.

It is a junction number, because it is equal to n+sod(n) for n = 87218983 and 87219001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87219023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43609514 + 43609515.

It is an arithmetic number, because the mean of its divisors is an integer number (43609515).

Almost surely, 2^87219029 is an apocalyptic number.

It is an amenable number.

87219029 is a deficient number, since it is larger than the sum of its proper divisors (1).

87219029 is an equidigital number, since it uses as much as digits as its factorization.

87219029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 87219029 is about 9339.1128593673. The cubic root of 87219029 is about 443.4763003333.

The spelling of 87219029 in words is "eighty-seven million, two hundred nineteen thousand, twenty-nine".