87855319 has 2 divisors, whose sum is σ = 87855320. Its totient is φ = 87855318.

The previous prime is 87855277. The next prime is 87855343. The reversal of 87855319 is 91355878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87855319 - 2⁷ = 87855191 is a prime.

It is a super-2 number, since 2×87855319² = 15437114153183522, which contains 22 as substring.

It is equal to p_5099887 and since 87855319 and 5099887 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87855349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43927659 + 43927660.

It is an arithmetic number, because the mean of its divisors is an integer number (43927660).

Almost surely, 2^87855319 is an apocalyptic number.

87855319 is a deficient number, since it is larger than the sum of its proper divisors (1).

87855319 is an equidigital number, since it uses as much as digits as its factorization.

87855319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 87855319 is about 9373.1168241946. The cubic root of 87855319 is about 444.5521210196.

The spelling of 87855319 in words is "eighty-seven million, eight hundred fifty-five thousand, three hundred nineteen".