87393851 has 2 divisors, whose sum is σ = 87393852. Its totient is φ = 87393850.

The previous prime is 87393841. The next prime is 87393853. The reversal of 87393851 is 15839378.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87393851 - 2¹⁰ = 87392827 is a prime.

It is a super-2 number, since 2×87393851² = 15275370385220402, which contains 22 as substring.

Together with 87393853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87393853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43696925 + 43696926.

It is an arithmetic number, because the mean of its divisors is an integer number (43696926).

Almost surely, 2^87393851 is an apocalyptic number.

87393851 is a deficient number, since it is larger than the sum of its proper divisors (1).

87393851 is an equidigital number, since it uses as much as digits as its factorization.

87393851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 87393851 is about 9348.4678423793. The cubic root of 87393851 is about 443.7724041852.

The spelling of 87393851 in words is "eighty-seven million, three hundred ninety-three thousand, eight hundred fifty-one".