313861187 has 2 divisors, whose sum is σ = 313861188. Its totient is φ = 313861186.

The previous prime is 313861147. The next prime is 313861189. The reversal of 313861187 is 781168313.

It is a strong prime.

It is an emirp because it is prime and its reverse (781168313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313861187 - 2²⁴ = 297083971 is a prime.

Together with 313861189, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_16961852 and since 313861187 and 16961852 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313861187.

It is not a weakly prime, because it can be changed into another prime (313861189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156930593 + 156930594.

It is an arithmetic number, because the mean of its divisors is an integer number (156930594).

Almost surely, 2^313861187 is an apocalyptic number.

313861187 is a deficient number, since it is larger than the sum of its proper divisors (1).

313861187 is an equidigital number, since it uses as much as digits as its factorization.

313861187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 313861187 is about 17716.1278782921. The cubic root of 313861187 is about 679.5882650212.

The spelling of 313861187 in words is "three hundred thirteen million, eight hundred sixty-one thousand, one hundred eighty-seven".