87219023 has 2 divisors, whose sum is σ = 87219024. Its totient is φ = 87219022.

The previous prime is 87219019. The next prime is 87219029. The reversal of 87219023 is 32091278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87219023 - 2² = 87219019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87219029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43609511 + 43609512.

It is an arithmetic number, because the mean of its divisors is an integer number (43609512).

Almost surely, 2^87219023 is an apocalyptic number.

87219023 is a deficient number, since it is larger than the sum of its proper divisors (1).

87219023 is an equidigital number, since it uses as much as digits as its factorization.

87219023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 87219023 is about 9339.1125381377. The cubic root of 87219023 is about 443.4762901641.

The spelling of 87219023 in words is "eighty-seven million, two hundred nineteen thousand, twenty-three".