87347719 has 2 divisors, whose sum is σ = 87347720. Its totient is φ = 87347718.

The previous prime is 87347651. The next prime is 87347723. The reversal of 87347719 is 91774378.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87347719 - 2¹⁵ = 87314951 is a prime.

It is a super-2 number, since 2×87347719² = 15259248029005922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87347779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43673859 + 43673860.

It is an arithmetic number, because the mean of its divisors is an integer number (43673860).

Almost surely, 2^87347719 is an apocalyptic number.

87347719 is a deficient number, since it is larger than the sum of its proper divisors (1).

87347719 is an equidigital number, since it uses as much as digits as its factorization.

87347719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 46.

The square root of 87347719 is about 9346.0001604965. Note that the first 3 decimals coincide. The cubic root of 87347719 is about 443.6943067313.

The spelling of 87347719 in words is "eighty-seven million, three hundred forty-seven thousand, seven hundred nineteen".